Problem Name | Online Judge | Year | Contest | Difficulty Level | |
---|---|---|---|---|---|

1 | Perfect Permutation | Codeforces | Codeforces Round #144 (Div. 2) | 1 | |

2 | T-primes | Codeforces | Codeforces Round #142 (Div. 2) | 1 | |

3 | Parallelepiped | Codeforces | Codeforces Round #138 (Div. 2) | 1 | |

4 | Drinks | Codeforces | Codeforces Round #126 (Div. 2) | 1 | |

5 | Cut Ribbon | Codeforces | Codeforces Round #119 (Div. 2) | 1 | |

6 | Tetrahedron | Codeforces | Codeforces Round #113 (Div. 2) | 1 | |

7 | Insomnia cure | Codeforces | Codeforces Round #105 (Div. 2) | 1 | |

8 | The number of positions | Codeforces | Codeforces Beta Round #92 (Div. 2 Only) | 1 | |

9 | Cifera | Codeforces | Codeforces Beta Round #86 (Div. 2 Only) | 1 | |

10 | Chips | Codeforces | Codeforces Beta Round #75 (Div. 2 Only) | 1 | |

11 | Toy Army | Codeforces | Codeforces Beta Round #72 (Div. 2 Only) | 1 | |

12 | Double Cola | Codeforces | Yandex.Algorithm 2011 Qualification 2 | 1 | |

13 | Panoramix's Prediction | Codeforces | Codeforces Beta Round #69 (Div. 2 Only) | 1 | |

14 | Domino piling | Codeforces | Codeforces Beta Round #47 | 1 | |

15 | Die Roll | Codeforces | Codeforces Beta Round #9 (Div. 2 Only) | 1 | |

16 | Triangle | Codeforces | Codeforces Beta Round #6 (Div. 2 Only) | 1 | |

17 | Watermelon | Codeforces | Codeforces Beta Round #4 (Div. 2 Only) | 1 | |

18 | Spreadsheet | Codeforces | Codeforces Beta Round #1 | 1 | |

19 | Theatre Square | Codeforces | Codeforces Beta Round #1 | 1 | |

20 | Buttons | Codeforces | Codeforces Round #164 (Div. 2) | 1 | |

21 | Fibonacci Numbers | TJU | 1 | ||

22 | Playing With Balls | SPOJ | 1 | ||

23 | Carmichael Numbers | UVA | 1 | ||

24 | Clock Hands | UVA | 1 | ||

25 | Why this kolaveri di | SPOJ | 1 | ||

26 | FANCY NUMBERS | SPOJ | 1 | ||

27 | Play with Dates | SPOJ | 1 | ||

28 | HOW MANY GAMES | SPOJ | 1 | ||

29 | Touch of Venom | SPOJ | 1 | ||

30 | Array fill I | URI | 1 | ||

31 | Relational Operator | UVA | 1 | ||

32 | The Large Family | Live Archive | 2013 | South Pacific | 1 |

33 | Prime Distance | UVA | 1 | ||

34 | New Year Candles | Codeforces | Good Bye 2013 | 1 | |

35 | N-Factorful | SPOJ | 1 | ||

36 | To Carry or not to Carry | UVA | 1 | ||

37 | Add them twice | A2 Online Judge | 1 | ||

38 | Complicated GCD | Codeforces | Codeforces Round #347 (Div. 2) | 1 | |

39 | Round House | Codeforces | Codeforces Round #346 (Div. 2) | 1 | |

40 | Watchmen | Codeforces | Codeforces Round #345 (Div. 1) & Codeforces Round #345 (Div. 2) | 1 | |

41 | Lucky Numbers | Codeforces | Experimental Educational Round: VolBIT Formulas Blitz | 1 | |

42 | Save Luke | Codeforces | AIM Tech Round (Div. 2) | 1 | |

43 | Professor GukiZ's Robot | Codeforces | Educational Codeforces Round 6 | 1 | |

44 | Elephant | Codeforces | Codeforces Round #340 (Div. 2) | 1 | |

45 | Pasha and Stick | Codeforces | Codeforces Round #337 (Div. 2) | 1 | |

46 | Tricky Sum | Codeforces | Educational Codeforces Round 1 | 1 | |

47 | The Monster and the Squirrel | Codeforces | Codeforces Round #328 (Div. 2) | 1 | |

48 | Wizards' Duel | Codeforces | Codeforces Round #327 (Div. 2) | 1 | |

49 | Duff in Love | Codeforces | Codeforces Round #326 (Div. 2) | 1 | |

50 | Olesya and Rodion | Codeforces | Codeforces Round #324 (Div. 2) | 1 | |

51 | Vasya and Petya's Game | Codeforces | Codeforces Round #319 (Div. 1) & Codeforces Round #319 (Div. 2) | 1 | |

52 | Simple Game | Codeforces | Codeforces Round #316 (Div. 2) | 1 | |

53 | Gerald's Hexagon | Codeforces | Codeforces Round #313 (Div. 1) & Codeforces Round #313 (Div. 2) | 1 | |

54 | Kyoya and Photobooks | Codeforces | Codeforces Round #309 (Div. 2) | 1 | |

55 | Vanya and Books | Codeforces | Codeforces Round #308 (Div. 2) | 1 | |

56 | Vanya and Table | Codeforces | Codeforces Round #308 (Div. 2) | 1 | |

57 | Divisibility by Eight | Codeforces | Codeforces Round #306 (Div. 2) | 1 | |

58 | Soldier and Bananas | Codeforces | Codeforces Round #304 (Div. 2) | 1 | |

59 | Playing with Paper | Codeforces | Codeforces Round #296 (Div. 2) | 1 | |

60 | Two Buttons | Codeforces | Codeforces Round #295 (Div. 2) | 1 | |

61 | A and B and Team Training | Codeforces | Codeforces Round #294 (Div. 2) | 1 | |

62 | Drazil and Factorial | Codeforces | Codeforces Round #292 (Div. 2) & Codeforces Round #292 (Div. 1) | 1 | |

63 | Drazil and Date | Codeforces | Codeforces Round #292 (Div. 2) | 1 | |

64 | Han Solo and Lazer Gun | Codeforces | Codeforces Round #291 (Div. 2) | 1 | |

65 | Game | Codeforces | Rockethon 2015 | 1 | |

66 | Amr and Pins | Codeforces | Codeforces Round #287 (Div. 2) | 1 | |

67 | Minimum Difficulty | Codeforces | Codeforces Round #283 (Div. 2) | 1 | |

68 | Vanya and Lanterns | Codeforces | Codeforces Round #280 (Div. 2) | 1 | |

69 | Calculating Function | Codeforces | Codeforces Round #277 (Div. 2) | 1 | |

70 | Expression | Codeforces | Codeforces Round #274 (Div. 2) | 1 | |

71 | Random Teams | Codeforces | Codeforces Round #273 (Div. 2) | 1 | |

72 | Dreamoon and WiFi | Codeforces | Codeforces Round #272 (Div. 2) | 1 | |

73 | Dreamoon and Stairs | Codeforces | Codeforces Round #272 (Div. 2) | 1 | |

74 | Design Tutorial: Learn from Math | Codeforces | Codeforces Round #270 | 1 | |

75 | Caisa and Pylons | Codeforces | Codeforces Round #264 (Div. 2) | 1 | |

76 | Fedya and Maths | Codeforces | Codeforces Round #260 (Div. 2) | 1 | |

77 | Jzzhu and Sequences | Codeforces | Codeforces Round #257 (Div. 2) | 1 | |

78 | Vanya and Cards | Codeforces | Codeforces Round #235 (Div. 2) | 1 | |

79 | Fox and Number Game | Codeforces | Codeforces Round #228 (Div. 2) | 1 | |

80 | Domino | Codeforces | Codeforces Round #205 (Div. 2) | 1 | |

81 | Jeff and Digits | Codeforces | Codeforces Round #204 (Div. 2) | 1 | |

82 | Hungry Sequence | Codeforces | Codeforces Round #191 (Div. 2) | 1 | |

83 | Even Odds | Codeforces | Codeforces Round #188 (Div. 2) | 1 | |

84 | Shaass and Oskols | Codeforces | Codeforces Round #178 (Div. 2) | 1 | |

85 | Dima and Friends | Codeforces | Codeforces Round #167 (Div. 2) | 1 | |

86 | Fancy Fence | Codeforces | Codeforces Round #165 (Div. 2) | 1 | |

87 | Little Elephant and Bits | Codeforces | Codeforces Round #157 (Div. 1) & Codeforces Round #157 (Div. 2) | 1 | |

88 | Young Physicist | Codeforces | Codeforces Beta Round #63 (Div. 2) | 1 | |

89 | Infinite Sequence | Codeforces | Codeforces Round #353 (Div. 2) | 1 | |

90 | Hashmat the Brave Warrior | UVA | 1 | ||

91 | Simple Math | A2 Online Judge | 1 | ||

92 | Initial Bet | Codeforces | Codeforces Round #273 (Div. 2) | 1 | |

93 | Prime Generator | SPOJ | 1 | ||

94 | I'm bored with life | Codeforces | Codeforces Round #422 (Div. 2) | 1 | |

95 | Sasha and Sticks | Codeforces | Codeforces Round #425 (Div. 2) | 1 | |

96 | Hello | A2 Online Judge | 1 | ||

97 | Add Two numbers | A2 Online Judge | 1 | ||

98 | Roommate Agreement | SPOJ | 1 | ||

99 | Prime or Not | SPOJ | 1 | ||

100 | DDD | URI | 1 | ||

101 | Factorial Frequencies | UVA | 1 | ||

102 | Bachgold Problem | Codeforces | Codeforces Round #388 (Div. 2) | 1 | |

103 | Taymyr is calling you | Codeforces | Codeforces Round #395 (Div. 2) | 1 | |

104 | Fraction | Codeforces | Codeforces Round #433 (Div. 2, based on Olympiad of Metropolises) | 1 | |

105 | Lovely Palindromes | Codeforces | Codeforces Round #360 (Div. 2) | 1 | |

106 | Arpa’s hard exam and Mehrdad’s naive cheat | Codeforces | Codeforces Round #383 (Div. 2) | 1 | |

107 | Anastasia and pebbles | Codeforces | Codeforces Round #407 (Div. 2) | 1 | |

108 | The Eternal Immortality | Codeforces | Codeforces Round #439 (Div. 2) | 1 | |

109 | Meeting of Old Friends | Codeforces | Codeforces Round #371 (Div. 2) | 1 | |

110 | Godsend | Codeforces | Codeforces Round #429 (Div. 2) | 1 | |

111 | The Monster | Codeforces | Codeforces Round #406 (Div. 2) | 1 | |

112 | Maximum Clique | ZOJ | 1 | ||

113 | Dragons | Codeforces | Codeforces Round #142 (Div. 2) | 1 | |

114 | Soldier and Cards | Codeforces | Codeforces Round #304 (Div. 2) | 1 | |

115 | Simple Equations | UVA | 1 | ||

116 | Simple Sum | URI | 1 | ||

117 | Simple Product | URI | 1 | ||

118 | Average 2 | URI | 1 | ||

119 | Difference | URI | 1 | ||

120 | Salary with Bonus | URI | 1 | ||

121 | Area | URI | 1 | ||

122 | Sphere | URI | 1 | ||

123 | Time Conversion | URI | 1 | ||

124 | Distance Between Two Points | URI | 1 | ||

125 | Fuel Spent | URI | 1 | ||

126 | Simple Calculate | URI | 1 | ||

127 | Bachelor Arithmetic | Live Archive | 2007 | Asia - Dhaka | 1 |

128 | GCD | UVA | 1 | ||

129 | Little Elephant and Magic Square | Codeforces | Codeforces Round #157 (Div. 2) | 2 | |

130 | Increase and Decrease | Codeforces | Codeforces Round #151 (Div. 2) | 2 | |

131 | Little Elephant and Function | Codeforces | Codeforces Round #136 (Div. 2) | 2 | |

132 | Another Problem on Strings | Codeforces | Codeforces Round #112 (Div. 2) | 2 | |

133 | The World is a Theatre | Codeforces | Codeforces Beta Round #95 (Div. 2) | 2 | |

134 | Opposites Attract | Codeforces | Codeforces Beta Round #95 (Div. 2) | 2 | |

135 | Faulty Odometer | TJU | 2 | ||

136 | Marbles | UVA | 2 | ||

137 | Permutations | UVA | 2 | ||

138 | Coconuts, Revisited | UVA | 2 | ||

139 | PRIMITIVEROOTS | SPOJ | 2 | ||

140 | GRADE POINT AVERAGE | SPOJ | 2 | ||

141 | EVEN COUNT | SPOJ | 2 | ||

142 | Triangular numbers | Codeforces | Codeforces Beta Round #44 (Div. 2) | 2 | |

143 | Matrix Multiplication | PKU | 2 | ||

144 | Lever | Codeforces | Codeforces Round #221 (Div. 2) | 2 | |

145 | Help Vasilisa the Wise 2 | Codeforces | Codeforces Round #102 (Div. 2) | 2 | |

146 | Simple Addition | UVA | 2 | ||

147 | Little Dima and Equation | Codeforces | Codeforces Round #262 (Div. 2) | 2 | |

148 | Mafia | Codeforces | Codeforces Round #202 (Div. 1) & Codeforces Round #202 (Div. 2) | 2 | |

149 | Ebony and Ivory | Codeforces | Manthan, Codefest 16 | 2 | |

150 | Divisibility | Codeforces | Experimental Educational Round: VolBIT Formulas Blitz | 2 | |

151 | Hexagons! | Codeforces | Experimental Educational Round: VolBIT Formulas Blitz | 2 | |

152 | Infinite Sequence | Codeforces | Educational Codeforces Round 7 | 2 | |

153 | Saitama Destroys Hotel | Codeforces | Codeforces Round #336 (Div. 2) | 2 | |

154 | Kyoya and Colored Balls | Codeforces | Codeforces Round #309 (Div. 1) & Codeforces Round #309 (Div. 2) | 2 | |

155 | Soldier and Number Game | Codeforces | Codeforces Round #304 (Div. 2) | 2 | |

156 | Tourist's Notes | Codeforces | Codeforces Round #300 | 2 | |

157 | Covered Path | Codeforces | Codeforces Round #298 (Div. 2) | 2 | |

158 | New Year Book Reading | Codeforces | Good Bye 2014 | 2 | |

159 | New Year Permutation | Codeforces | Good Bye 2014 | 2 | |

160 | Hacking Cypher | Codeforces | Codeforces Round #279 (Div. 2) | 2 | |

161 | Factory | Codeforces | Codeforces Round #276 (Div. 2) | 2 | |

162 | 24 Game | Codeforces | Codeforces Round #268 (Div. 1) & Codeforces Round #268 (Div. 2) | 2 | |

163 | Bear and Strings | Codeforces | Codeforces Round #226 (Div. 2) | 2 | |

164 | Fixed Points | Codeforces | Codeforces Round #201 (Div. 2) | 2 | |

165 | Alice and Bob | Codeforces | Codeforces Round #201 (Div. 1) & Codeforces Round #201 (Div. 2) | 2 | |

166 | Simple Molecules | Codeforces | Codeforces Round #200 (Div. 2) | 2 | |

167 | Rational Resistance | Codeforces | Codeforces Round #200 (Div. 1) & Codeforces Round #200 (Div. 2) | 2 | |

168 | The Wall | Codeforces | Codeforces Round #198 (Div. 2) | 2 | |

169 | Vasily the Bear and Triangle | Codeforces | Codeforces Round #195 (Div. 2) | 2 | |

170 | Ciel and Flowers | Codeforces | Codeforces Round #190 (Div. 2) | 2 | |

171 | Archer | Codeforces | Codeforces Round #185 (Div. 2) | 2 | |

172 | Yaroslav and Permutations | Codeforces | Codeforces Round #179 (Div. 2) | 2 | |

173 | Painting Eggs | Codeforces | Codeforces Round #173 (Div. 2) | 2 | |

174 | Prime Matrix | Codeforces | Codeforces Round #166 (Div. 2) | 2 | |

175 | Adding Digits | Codeforces | Codeforces Round #158 (Div. 2) | 2 | |

176 | Two Bags of Potatoes | Codeforces | Codeforces Round #148 (Div. 2) | 2 | |

177 | Hexadecimal's Numbers | Codeforces | Codeforces Beta Round #9 (Div. 2 Only) | 2 | |

178 | Drazil and His Happy Friends | Codeforces | Codeforces Round #292 (Div. 1) & Codeforces Round #292 (Div. 2) & Codeforces Round #292 (Div. 1) & Codeforces Round #292 (Div. 2) | 2 | |

179 | Little Artem and Presents | Codeforces | Codeforces Round #348 (VK Cup 2016 Round 2, Div. 2 Edition) | 2 | |

180 | Pouring Rain | Codeforces | Codeforces Round #349 (Div. 2) | 2 | |

181 | Restoring Painting | Codeforces | Codeforces Round #353 (Div. 2) | 2 | |

182 | Vanya and Food Processor | Codeforces | Codeforces Round #355 (Div. 2) | 2 | |

183 | Queries on a String | Codeforces | Educational Codeforces Round 1 | 2 | |

184 | Searching the Graph | SPOJ Poland | 2 | ||

185 | Frugal Search | Live Archive | 2006 | North America - Mid-Central USA | 2 |

186 | Leha and Function | Codeforces | Codeforces Round #429 (Div. 1) & Codeforces Round #429 (Div. 2) | 2 | |

187 | Plus and Square Root | Codeforces | Codeforces Round #372 (Div. 1) & Codeforces Round #372 (Div. 2) | 2 | |

188 | Tennis Championship | Codeforces | Codeforces Round #382 (Div. 2) & Codeforces Round #382 (Div. 1) | 2 | |

189 | Taxes | Codeforces | Codeforces Round #382 (Div. 2) & Codeforces Round #382 (Div. 1) | 2 | |

190 | Pride | Codeforces | Codeforces Round #446 (Div. 1) & Codeforces Round #446 (Div. 2) | 2 | |

191 | Straight <<A>> | Codeforces | Codeforces Round #415 (Div. 2) | 2 | |

192 | Okabe and Banana Trees | Codeforces | Codeforces Round #420 (Div. 2) | 2 | |

193 | Position in Fraction | Codeforces | Codeforces Round #450 (Div. 2) | 2 | |

194 | Mishka and trip | Codeforces | Codeforces Round #365 (Div. 2) | 2 | |

195 | Vladik and fractions | Codeforces | Codeforces Round #384 (Div. 2) | 2 | |

196 | Pythagorean Triples | Codeforces | Codeforces Round #368 (Div. 2) | 2 | |

197 | Arpa’s obvious problem and Mehrdad’s terrible solution | Codeforces | Codeforces Round #383 (Div. 2) | 2 | |

198 | Anton and Fairy Tale | Codeforces | Codeforces Round #404 (Div. 2) | 2 | |

199 | GCD Table | Codeforces | Codeforces Round #323 (Div. 1) & Codeforces Round #323 (Div. 2) | 2 | |

200 | Non-square Equation | Codeforces | Codeforces Round #144 (Div. 2) | 3 | |

201 | Tiling with Hexagons | Codeforces | Codeforces Round #133 (Div. 2) | 3 | |

202 | Let's Watch Football | Codeforces | Codeforces Round #123 (Div. 2) | 3 | |

203 | Exams | Codeforces | Codeforces Round #122 (Div. 2) | 3 | |

204 | Vasya and the Bus | Codeforces | Codeforces Round #120 (Div. 2) | 3 | |

205 | Plant | Codeforces | Codeforces Round #118 (Div. 1) & Codeforces Round #118 (Div. 2) | 3 | |

206 | Median | Codeforces | Codeforces Round #113 (Div. 2) | 3 | |

207 | New Year Table | Codeforces | Codeforces Round #100 | 3 | |

208 | Ternary Logic | Codeforces | Codeforces Beta Round #97 (Div. 2) | 3 | |

209 | Testing Pants for Sadness | Codeforces | Codeforces Beta Round #80 (Div. 1 Only) & Codeforces Beta Round #80 (Div. 2 Only) | 3 | |

210 | Noldbach problem | Codeforces | Codeforces Beta Round #17 | 3 | |

211 | Numbers | Codeforces | Codeforces Beta Round #13 | 3 | |

212 | Increasing Sequence | Codeforces | Codeforces Beta Round #11 | 3 | |

213 | The least round way | Codeforces | Codeforces Beta Round #2 | 3 | |

214 | Azooz | SPOJ | 3 | ||

215 | Fox Dividing Cheese | Codeforces | Codeforces Round #218 (Div. 2) | 3 | |

216 | Catch Me If You Can | SPOJ | 3 | ||

217 | FUN WITH LETTERS | SPOJ | 3 | ||

218 | ZEROES IN RANGE V2 | SPOJ | 3 | ||

219 | N - DIGIT NUMBERS | SPOJ | 3 | ||

220 | LUCKYNINE | SPOJ | 3 | ||

221 | SPIRAL RUN | SPOJ | 3 | ||

222 | Easy Sum-2 | A2 Online Judge | 3 | ||

223 | Burger | UVA | 3 | ||

224 | Pashmak and Buses | Codeforces | Codeforces Round #261 (Div. 2) | 3 | |

225 | Rook, Bishop and King | Codeforces | Codeforces Round #217 (Div. 2) | 3 | |

226 | Cows and Primitive Roots | Codeforces | Codeforces Round #174 (Div. 2) | 3 | |

227 | Modular Equations | Codeforces | Codeforces Round #282 (Div. 2) | 3 | |

228 | Polynomial-time Reductions | Live Archive | 2008 | Asia - Hefei | 3 |

229 | Powerful array | Codeforces | Yandex.Algorithm 2011 Round 2 | 3 | |

230 | Geometry Problem | Live Archive | 2009 | Asia - Amritapuri | 3 |

231 | Bicycle Race | Codeforces | Codeforces Round #346 (Div. 2) | 3 | |

232 | A Trivial Problem | Codeforces | Manthan, Codefest 16 | 3 | |

233 | Moore's Law | Codeforces | Experimental Educational Round: VolBIT Formulas Blitz | 3 | |

234 | Guest From the Past | Codeforces | Codeforces Round #342 (Div. 2) | 3 | |

235 | Replace To Make Regular Bracket Sequence | Codeforces | Educational Codeforces Round 4 | 3 | |

236 | A Problem about Polyline | Codeforces | Codeforces Round #320 (Div. 1) [Bayan Thanks-Round] & Codeforces Round #320 (Div. 2) [Bayan Thanks-Round] | 3 | |

237 | Music | Codeforces | Codeforces Round #315 (Div. 2) | 3 | |

238 | Primes or Palindromes? | Codeforces | Codeforces Round #315 (Div. 1) & Codeforces Round #315 (Div. 2) | 3 | |

239 | Vanya and Scales | Codeforces | Codeforces Round #308 (Div. 2) | 3 | |

240 | Polycarpus' Dice | Codeforces | Codeforces Round #298 (Div. 2) | 3 | |

241 | DNA Alignment | Codeforces | Codeforces Round #295 (Div. 2) & Codeforces Round #295 (Div. 1) | 3 | |

242 | Guess Your Way Out! | Codeforces | Codeforces Round #287 (Div. 2) | 3 | |

243 | Maximum Value | Codeforces | Codeforces Round #276 (Div. 1) & Codeforces Round #276 (Div. 2) | 3 | |

244 | Dreamoon and Sums | Codeforces | Codeforces Round #272 (Div. 2) & Codeforces Round #272 (Div. 1) | 3 | |

245 | Jzzhu and Chocolate | Codeforces | Codeforces Round #257 (Div. 1) & Codeforces Round #257 (Div. 2) | 3 | |

246 | Andrey and Problem | Codeforces | Codeforces Round #253 (Div. 1) & Codeforces Round #253 (Div. 2) | 3 | |

247 | Mashmokh and Tokens | Codeforces | Codeforces Round #240 (Div. 2) | 3 | |

248 | Triangle | Codeforces | Codeforces Round #239 (Div. 1) & Codeforces Round #239 (Div. 2) | 3 | |

249 | Unusual Product | Codeforces | Codeforces Round #238 (Div. 2) & Codeforces Round #238 (Div. 1) | 3 | |

250 | Nuts | Codeforces | Codeforces Round #236 (Div. 2) | 3 | |

251 | Sereja and Contests | Codeforces | Codeforces Round #235 (Div. 2) | 3 | |

252 | Bear and Prime Numbers | Codeforces | Codeforces Round #226 (Div. 2) | 3 | |

253 | K-Periodic Array | Codeforces | Codeforces Round #218 (Div. 2) | 3 | |

254 | Valera and Contest | Codeforces | Codeforces Round #216 (Div. 2) | 3 | |

255 | Levko and Permutation | Codeforces | Codeforces Round #210 (Div. 2) | 3 | |

256 | Permutation | Codeforces | Codeforces Round #209 (Div. 2) | 3 | |

257 | Vasya and Robot | Codeforces | Codeforces Round #206 (Div. 1) & Codeforces Round #206 (Div. 2) | 3 | |

258 | Quiz | Codeforces | Codeforces Round #196 (Div. 2) & Codeforces Round #196 (Div. 1) | 3 | |

259 | Routine Problem | Codeforces | Codeforces Round #196 (Div. 2) | 3 | |

260 | Pythagorean Theorem II | Codeforces | Codeforces Round #183 (Div. 2) | 3 | |

261 | Lucky Permutation Triple | Codeforces | Codeforces Round #183 (Div. 1) & Codeforces Round #183 (Div. 2) | 3 | |

262 | XOR and OR | Codeforces | Codeforces Round #173 (Div. 2) | 3 | |

263 | Little Girl and Maximum XOR | Codeforces | Codeforces Round #169 (Div. 2) | 3 | |

264 | Common Divisors | Codeforces | Codeforces Round #117 (Div. 2) | 3 | |

265 | Robbers' watch | Codeforces | Codeforces Round #359 (Div. 1) & Codeforces Round #359 (Div. 2) | 3 | |

266 | Do you want a date? | Codeforces | Codeforces Round #415 (Div. 1) & Codeforces Round #415 (Div. 2) | 3 | |

267 | Arpa's loud Owf and Mehrdad's evil plan | Codeforces | Codeforces Round #383 (Div. 1) & Codeforces Round #383 (Div. 2) | 3 | |

268 | The Meaningless Game | Codeforces | Codeforces Round #426 (Div. 1) & Codeforces Round #426 (Div. 2) | 3 | |

269 | Arpa and an exam about geometry | Codeforces | Codeforces Round #432 (Div. 2, based on IndiaHacks Final Round 2017) | 3 | |

270 | Memory and De-Evolution | Codeforces | Codeforces Round #370 (Div. 2) | 3 | |

271 | Masha and geometric depression | Codeforces | Codeforces Round #407 (Div. 2) | 3 | |

272 | Simple Arithmetics | Live Archive | 2000 | Europe - Central | 3 |

273 | Year of University Entrance | Codeforces | VK Cup 2017 - Qualification 1 | 3 | |

274 | Flying Saucer Segments | Codeforces | Codeforces Round #140 (Div. 1) & Codeforces Round #140 (Div. 2) | 4 | |

275 | Olympic Medal | Codeforces | Codeforces Round #132 (Div. 2) | 4 | |

276 | About Bacteria | Codeforces | Codeforces Round #125 (Div. 1) & Codeforces Round #125 (Div. 2) | 4 | |

277 | Limit | Codeforces | Codeforces Round #124 (Div. 2) | 4 | |

278 | Plate Game | Codeforces | Codeforces Round #124 (Div. 2) | 4 | |

279 | After Training | Codeforces | Codeforces Round #123 (Div. 2) | 4 | |

280 | Square | Codeforces | Codeforces Round #122 (Div. 2) | 4 | |

281 | Counting Rhombi | Codeforces | Codeforces Round #119 (Div. 2) | 4 | |

282 | Find Pair | Codeforces | Codeforces Round #111 (Div. 2) | 4 | |

283 | Colliders | Codeforces | Codeforces Round #109 (Div. 1) & Codeforces Round #109 (Div. 2) | 4 | |

284 | Quantity of Strings | Codeforces | Codeforces Round #107 (Div. 1) & Codeforces Round #107 (Div. 2) | 4 | |

285 | Division into Teams | Codeforces | Codeforces Round #106 (Div. 2) | 4 | |

286 | Bag of mice | Codeforces | Codeforces Round #105 (Div. 2) | 4 | |

287 | Escape | Codeforces | Codeforces Round #105 (Div. 2) | 4 | |

288 | Hopscotch | Codeforces | Codeforces Round #101 (Div. 2) | 4 | |

289 | Winnie-the-Pooh and honey | Codeforces | School Regional Team Contest, Saratov, 2011 | 4 | |

290 | Elevator | Codeforces | School Regional Team Contest, Saratov, 2011 | 4 | |

291 | Petya and Square | Codeforces | Codeforces Beta Round #85 (Div. 2 Only) | 4 | |

292 | Binary Number | Codeforces | Codeforces Beta Round #75 (Div. 2 Only) | 4 | |

293 | Cableway | Codeforces | Codeforces Beta Round #74 (Div. 2 Only) | 4 | |

294 | Trains | Codeforces | Codeforces Beta Round #73 (Div. 1 Only) & Codeforces Beta Round #73 (Div. 2 Only) | 4 | |

295 | Magical Array | Codeforces | Codeforces Beta Round #72 (Div. 1 Only) & Codeforces Beta Round #72 (Div. 2 Only) | 4 | |

296 | Depression | Codeforces | Codeforces Beta Round #69 (Div. 2 Only) | 4 | |

297 | Round Table Knights | Codeforces | Codeforces Beta Round #65 (Div. 2) | 4 | |

298 | Progress Bar | Codeforces | Codeforces Beta Round #65 (Div. 2) | 4 | |

299 | Cookies | Codeforces | Codeforces Beta Round #64 | 4 | |

300 | A Student's Dream | Codeforces | Codeforces Beta Round #58 | 4 | |

301 | Weird Fence | UVA | 4 | ||

302 | Face the mate | SPOJ | 4 | ||

303 | Rebus | Codeforces | Codeforces Round #347 (Div. 1) & Codeforces Round #347 (Div. 2) | 4 | |

304 | Mischievous Mess Makers | Codeforces | CROC 2016 - Elimination Round | 4 | |

305 | Forecast | Codeforces | Experimental Educational Round: VolBIT Formulas Blitz | 4 | |

306 | Indivisibility | Codeforces | Experimental Educational Round: VolBIT Formulas Blitz | 4 | |

307 | XOR Equation | Codeforces | 8VC Venture Cup 2016 - Final Round | 4 | |

308 | Multipliers | Codeforces | Codeforces Round #338 (Div. 2) | 4 | |

309 | Spongebob and Squares | Codeforces | Codeforces Round #332 (Div. 2) | 4 | |

310 | Divisibility | Codeforces | Testing Round #12 | 4 | |

311 | Pasha and Phone | Codeforces | Codeforces Round #330 (Div. 2) | 4 | |

312 | The Big Race | Codeforces | Codeforces Round #328 (Div. 2) | 4 | |

313 | Three Logos | Codeforces | Codeforces Round #322 (Div. 2) | 4 | |

314 | Gerald and Giant Chess | Codeforces | Codeforces Round #313 (Div. 1) & Codeforces Round #313 (Div. 2) | 4 | |

315 | Vanya and Triangles | Codeforces | Codeforces Round #308 (Div. 2) | 4 | |

316 | Tavas and Karafs | Codeforces | Codeforces Round #299 (Div. 2) & Codeforces Round #299 (Div. 1) | 4 | |

317 | Permutations | Codeforces | Rockethon 2015 | 4 | |

318 | Fox And Jumping | Codeforces | Codeforces Round #290 (Div. 2) & Codeforces Round #290 (Div. 1) | 4 | |

319 | Vanya and Computer Game | Codeforces | Codeforces Round #280 (Div. 2) | 4 | |

320 | Friends and Presents | Codeforces | Codeforces Round #275 (Div. 2) | 4 | |

321 | Dreamoon and Sets | Codeforces | Codeforces Round #272 (Div. 2) & Codeforces Round #272 (Div. 1) | 4 | |

322 | MUH and House of Cards | Codeforces | Codeforces Round #269 (Div. 2) | 4 | |

323 | Wonder Room | Codeforces | Codeforces Round #266 (Div. 2) | 4 | |

324 | Count Good Substrings | Codeforces | Codeforces Round #258 (Div. 2) | 4 | |

325 | Predict Outcome of the Game | Codeforces | Codeforces Round #258 (Div. 2) | 4 | |

326 | DZY Loves Physics | Codeforces | Codeforces Round #254 (Div. 1) & Codeforces Round #254 (Div. 2) | 4 | |

327 | Om Nom and Spiders | Codeforces | Zepto Code Rush 2014 | 4 | |

328 | Magic Formulas | Codeforces | Codeforces Round #242 (Div. 2) | 4 | |

329 | Toy Sum | Codeforces | Codeforces Round #238 (Div. 2) & Codeforces Round #238 (Div. 1) | 4 | |

330 | Marathon | Codeforces | Codeforces Round #237 (Div. 2) | 4 | |

331 | Inna and Huge Candy Matrix | Codeforces | Codeforces Round #234 (Div. 2) | 4 | |

332 | Divisible by Seven | Codeforces | Codeforces Round #221 (Div. 1) & Codeforces Round #221 (Div. 2) | 4 | |

333 | Two Semiknights Meet | Codeforces | Codeforces Round #212 (Div. 2) | 4 | |

334 | Pair of Numbers | Codeforces | Codeforces Round #209 (Div. 2) | 4 | |

335 | Find Maximum | Codeforces | Codeforces Round #205 (Div. 2) | 4 | |

336 | Jeff and Rounding | Codeforces | Codeforces Round #204 (Div. 1) & Codeforces Round #204 (Div. 2) | 4 | |

337 | Tourist Problem | Codeforces | Codeforces Round #198 (Div. 2) & Codeforces Round #198 (Div. 1) | 4 | |

338 | Magic Five | Codeforces | Codeforces Round #191 (Div. 2) | 4 | |

339 | Ciel and Robot | Codeforces | Codeforces Round #190 (Div. 1) & Codeforces Round #190 (Div. 2) | 4 | |

340 | Pipeline | Codeforces | Codeforces Round #176 (Div. 2) | 4 | |

341 | Lucky Permutation | Codeforces | Codeforces Round #176 (Div. 1) & Codeforces Round #176 (Div. 2) | 4 | |

342 | Dima and Sequence | Codeforces | Codeforces Round #167 (Div. 2) | 4 | |

343 | Magical Boxes | Codeforces | Codeforces Round #165 (Div. 1) & Codeforces Round #165 (Div. 2) | 4 | |

344 | Subtractions | Codeforces | Codeforces Testing Round #5 | 4 | |

345 | View Angle | Codeforces | Codeforces Round #159 (Div. 2) | 4 | |

346 | Chilly Willy | Codeforces | Codeforces Round #152 (Div. 2) | 4 | |

347 | Hometask | Codeforces | Codeforces Round #131 (Div. 2) | 4 | |

348 | Ancient Berland Circus | Codeforces | Codeforces Beta Round #1 | 4 | |

349 | Remainders Game | Codeforces | Codeforces Round #360 (Div. 1) & Codeforces Round #360 (Div. 2) | 4 | |

350 | Cylinder | UVA | 4 | ||

351 | As Fast As Possible | Codeforces | Codeforces Round #364 (Div. 1) & Codeforces Round #364 (Div. 2) | 4 | |

352 | Mike and Chocolate Thieves | Codeforces | Codeforces Round #361 (Div. 2) | 4 | |

353 | The Intriguing Obsession | Codeforces | Codeforces Round #439 (Div. 2) | 4 | |

354 | Ralph And His Magic Field | Codeforces | Codeforces Round #447 (Div. 2) | 4 | |

355 | Directed Roads | Codeforces | Codeforces Round #369 (Div. 2) | 4 | |

356 | Marco and GCD Sequence | Codeforces | Codeforces Round #447 (Div. 2) | 4 | |

357 | Ilya And The Tree | Codeforces | Codeforces Round #430 (Div. 2) | 4 | |

358 | Alternating Sum | Codeforces | Tinkoff Internship Warmup Round 2018 and Codeforces Round #475 (Div. 1) & Tinkoff Internship Warmup Round 2018 and Codeforces Round #475 (Div. 2) | 4 | |

359 | Not Wool Sequences | Codeforces | Codeforces Round #148 (Div. 1) & Codeforces Round #148 (Div. 2) | 5 | |

360 | Clear Symmetry | Codeforces | Codeforces Round #127 (Div. 1) & Codeforces Round #127 (Div. 2) | 5 | |

361 | Rock-Paper-Scissors | Codeforces | Croc Champ 2012 - Round 1 | 5 | |

362 | Help Farmer | Codeforces | Codeforces Round #102 (Div. 1) & Codeforces Round #102 (Div. 2) | 5 | |

363 | Rectangle and Square | Codeforces | Codeforces Beta Round #97 (Div. 1) & Codeforces Beta Round #97 (Div. 2) | 5 | |

364 | Measuring Lengths in Baden | Codeforces | Codeforces Testing Round #2 | 5 | |

365 | Elevator | Codeforces | Codeforces Beta Round #88 | 5 | |

366 | Lucky Tree | Codeforces | Codeforces Beta Round #84 (Div. 1 Only) & Codeforces Beta Round #84 (Div. 2 Only) | 5 | |

367 | Datatypes | Codeforces | Codeforces Beta Round #83 (Div. 2 Only) | 5 | |

368 | Friends | Codeforces | Codeforces Beta Round #76 (Div. 2 Only) | 5 | |

369 | Colorful Field | Codeforces | Codeforces Beta Round #71 | 5 | |

370 | Falling Anvils | Codeforces | Codeforces Beta Round #69 (Div. 1 Only) & Codeforces Beta Round #69 (Div. 2 Only) | 5 | |

371 | Petya and His Friends | Codeforces | Codeforces Beta Round #61 (Div. 2) | 5 | |

372 | Flea travel | Codeforces | Codeforces Beta Round #51 | 5 | |

373 | Sum | Codeforces | Codeforces Beta Round #46 (Div. 2) | 5 | |

374 | Find Color | Codeforces | Codeforces Beta Round #39 | 5 | |

375 | Cubical Planet | Codeforces | School Team Contest #1 (Winter Computer School 2010/11) | 5 | |

376 | Chess | Codeforces | School Personal Contest #1 (Winter Computer School 2010/11) - Codeforces Beta Round #38 (ACM-ICPC Rules) | 5 | |

377 | Accounting | Codeforces | Codeforces Beta Round #30 (Codeforces format) | 5 | |

378 | Equation | Codeforces | Codeforces Alpha Round #20 (Codeforces format) | 5 | |

379 | Four Segments | Codeforces | Codeforces Beta Round #14 (Div. 2) | 5 | |

380 | Jumping Jack | Codeforces | Codeforces Beta Round #11 | 5 | |

381 | Line | Codeforces | Codeforces Beta Round #7 | 5 | |

382 | N-ARY TREE | SPOJ | 5 | ||

383 | Careful teacher | UVA | 5 | ||

384 | Fancy Number | Codeforces | Codeforces Beta Round #89 (Div. 2) | 5 | |

385 | Fibonacci-ish | Codeforces | Manthan, Codefest 16 | 5 | |

386 | Moodular Arithmetic | Codeforces | Codeforces Round #334 (Div. 1) & Codeforces Round #334 (Div. 2) | 5 | |

387 | Chip 'n Dale Rescue Rangers | Codeforces | Codeforces Round #327 (Div. 1) & Codeforces Round #327 (Div. 2) | 5 | |

388 | Lengthening Sticks | Codeforces | Codeforces Round #317 [AimFund Thanks-Round] (Div. 1) & Codeforces Round #317 [AimFund Thanks-Round] (Div. 2) | 5 | |

389 | Symmetric and Transitive | Codeforces | Codeforces Round #315 (Div. 1) & Codeforces Round #315 (Div. 2) | 5 | |

390 | Clique in the Divisibility Graph | Codeforces | VK Cup 2015 - Finals, online mirror | 5 | |

391 | Vitaly and Cycle | Codeforces | Codeforces Round #311 (Div. 2) | 5 | |

392 | Kyoya and Permutation | Codeforces | Codeforces Round #309 (Div. 1) & Codeforces Round #309 (Div. 2) | 5 | |

393 | Degenerate Matrix | Codeforces | Looksery Cup 2015 | 5 | |

394 | Mike and Frog | Codeforces | Codeforces Round #305 (Div. 1) & Codeforces Round #305 (Div. 2) | 5 | |

395 | Soldier and Traveling | Codeforces | Codeforces Round #304 (Div. 2) | 5 | |

396 | Board Game | Codeforces | VK Cup 2015 - Round 2 (unofficial online mirror, Div. 1 only) | 5 | |

397 | Om Nom and Candies | Codeforces | ZeptoLab Code Rush 2015 | 5 | |

398 | Pretty Song | Codeforces | Codeforces Round #289 (Div. 2, ACM ICPC Rules) | 5 | |

399 | Chocolate | Codeforces | Codeforces Round #279 (Div. 2) | 5 | |

400 | Valid Sets | Codeforces | Codeforces Round #277 (Div. 2) | 5 | |

401 | CGCDSSQ | Codeforces | Bayan 2015 Contest Warm Up | 5 | |

402 | Ryouko's Memory Note | Codeforces | Codeforces Round #248 (Div. 2) & Codeforces Round #248 (Div. 1) | 5 | |

403 | Elimination | Codeforces | RCC 2014 Warmup (Div. 2) | 5 | |

404 | Upgrading Array | Codeforces | Codeforces Round #236 (Div. 2) & Codeforces Round #236 (Div. 1) | 5 | |

405 | Fox and Minimal path | Codeforces | Codeforces Round #228 (Div. 1) & Codeforces Round #228 (Div. 2) | 5 | |

406 | Making Sequences is Fun | Codeforces | Codeforces Round #219 (Div. 2) | 5 | |

407 | Prime Number | Codeforces | Codeforces Round #209 (Div. 2) | 5 | |

408 | Xenia and Hamming | Codeforces | Codeforces Round #207 (Div. 1) & Codeforces Round #207 (Div. 2) | 5 | |

409 | Two Heaps | Codeforces | Codeforces Round #205 (Div. 2) | 5 | |

410 | Iahub and Permutations | Codeforces | Codeforces Round #198 (Div. 2) & Codeforces Round #198 (Div. 1) | 5 | |

411 | Malek Dance Club | Codeforces | Codeforces Round #189 (Div. 1) & Codeforces Round #189 (Div. 2) | 5 | |

412 | Special Task | Codeforces | ABBYY Cup 3.0 | 5 | |

413 | Continued Fractions | Codeforces | Codeforces Round #184 (Div. 2) | 5 | |

414 | Polo the Penguin and XOR operation | Codeforces | Codeforces Round #177 (Div. 1) & Codeforces Round #177 (Div. 2) | 5 | |

415 | Dima and Two Sequences | Codeforces | Codeforces Round #167 (Div. 2) & Codeforces Round #167 (Div. 1) | 5 | |

416 | Expensive Drink | Live Archive | 2007 | Asia - Beijing | 5 |

417 | Misha and Permutations Summation | Codeforces | Codeforces Round #285 (Div. 2) & Codeforces Round #285 (Div. 1) | 5 | |

418 | Array Game | Live Archive | 2009 | Asia - Tehran | 5 |

419 | Square Subsets | Codeforces | Codeforces Round #448 (Div. 2) | 5 | |

420 | Winter is here | Codeforces | Codeforces Round #428 (Div. 2) | 5 | |

421 | Anton and School - 2 | Codeforces | Codeforces Round #404 (Div. 2) | 5 | |

422 | Hunting Digletts | URI | 5 | ||

423 | Little Elephant and LCM | Codeforces | Codeforces Round #157 (Div. 1) & Codeforces Round #157 (Div. 2) | 6 | |

424 | Mr. Bender and Square | Codeforces | Codeforces Round #156 (Div. 2) & Codeforces Round #156 (Div. 1) | 6 | |

425 | Playing with Permutations | Codeforces | Codeforces Round #153 (Div. 1) & Codeforces Round #153 (Div. 2) | 6 | |

426 | Let's Play Osu! | Codeforces | Codeforces Round #146 (Div. 1) & Codeforces Round #146 (Div. 2) | 6 | |

427 | Table | Codeforces | Codeforces Round #144 (Div. 1) & Codeforces Round #144 (Div. 2) | 6 | |

428 | Triangles | Codeforces | Codeforces Round #142 (Div. 1) & Codeforces Round #142 (Div. 2) | 6 | |

429 | Partial Sums | Codeforces | Codeforces Round #138 (Div. 1) & Codeforces Round #138 (Div. 2) | 6 | |

430 | Hit Ball | Codeforces | Codeforces Round #128 (Div. 2) | 6 | |

431 | Guess That Car! | Codeforces | Codeforces Round #127 (Div. 1) & Codeforces Round #127 (Div. 2) | 6 | |

432 | Mushroom Scientists | Codeforces | Codeforces Round #118 (Div. 1) & Codeforces Round #118 (Div. 2) | 6 | |

433 | Mathematical Analysis Rocks! | Codeforces | Codeforces Round #116 (Div. 2, ACM-ICPC Rules) | 6 | |

434 | Problem About Equation | Codeforces | VK Cup 2012 Round 3 (Unofficial Div. 2 Edition) | 6 | |

435 | Lucky Subsequence | Codeforces | Codeforces Round #104 (Div. 1) & Codeforces Round #104 (Div. 2) | 6 | |

436 | Wallpaper | Codeforces | Codeforces Beta Round #99 (Div. 2) | 6 | |

437 | Hot Bath | Codeforces | Codeforces Beta Round #93 (Div. 1 Only) & Codeforces Beta Round #93 (Div. 2 Only) | 6 | |

438 | Doctor | Codeforces | Codeforces Beta Round #72 (Div. 1 Only) & Codeforces Beta Round #72 (Div. 2 Only) | 6 | |

439 | Average Score | Codeforces | Yandex.Algorithm Open 2011 Qualification 1 | 6 | |

440 | Points | Codeforces | All-Ukrainian School Olympiad in Informatics | 6 | |

441 | The Elder Trolls IV: Oblivon | Codeforces | Codeforces Beta Round #66 | 6 | |

442 | Harry Potter and Three Spells | Codeforces | Codeforces Beta Round #60 | 6 | |

443 | Array | Codeforces | Codeforces Beta Round #53 | 6 | |

444 | 3-cycles | Codeforces | Codeforces Beta Round #40 (Div. 2) | 6 | |

445 | Flea | Codeforces | Codeforces Beta Round #32 (Div. 2, Codeforces format) | 6 | |

446 | Platforms | Codeforces | Codeforces Beta Round #18 (Div. 2 Only) | 6 | |

447 | Collision Detection | Live Archive | 2012 | North America - Mid-Atlantic USA & North America - Southeast USA | 6 |

448 | GAMING ARENA | SPOJ | 6 | ||

449 | ZEROES IN RANGE | SPOJ | 6 | ||

450 | ANYTHING FOR ATTENDANCE | SPOJ | 6 | ||

451 | CHOCOLATES | SPOJ | 6 | ||

452 | CUBE ROOT | SPOJ | 6 | ||

453 | Parallel Expectations | Live Archive | 2001 | Asia - Tehran | 6 |

454 | International Olympiad | Codeforces | CROC 2016 - Final Round [Private, For Onsite Finalists Only] | 6 | |

455 | Bear and Polynomials | Codeforces | VK Cup 2016 - Round 1 | 6 | |

456 | Longest Subsequence | Codeforces | Educational Codeforces Round 9 | 6 | |

457 | A rectangle | Codeforces | Experimental Educational Round: VolBIT Formulas Blitz | 6 | |

458 | GukiZ and Binary Operations | Codeforces | Codeforces Round #307 (Div. 2) | 6 | |

459 | A Heap of Heaps | Codeforces | Codeforces Round #300 | 6 | |

460 | Demiurges Play Again | Codeforces | Codeforces Round #300 | 6 | |

461 | Pluses everywhere | Codeforces | Codeforces Round #295 (Div. 2) & Codeforces Round #295 (Div. 1) | 6 | |

462 | Vanya and Field | Codeforces | Codeforces Round #280 (Div. 2) | 6 | |

463 | LIS of Sequence | Codeforces | Codeforces Round #277 (Div. 2) | 6 | |

464 | Golden System | Codeforces | MemSQL Start[c]UP 2.0 - Round 2 | 6 | |

465 | Magic Trick | Codeforces | MemSQL Start[c]UP 2.0 - Round 1 | 6 | |

466 | Random Task | Codeforces | Codeforces Round #247 (Div. 2) | 6 | |

467 | Police Patrol | Codeforces | Codeforces Round #244 (Div. 2) | 6 | |

468 | Jeopardy! | Codeforces | Coder-Strike 2014 - Round 2 | 6 | |

469 | Number Busters | Codeforces | Codeforces Round #224 (Div. 2) | 6 | |

470 | Watching Fireworks is Fun | Codeforces | Codeforces Round #219 (Div. 1) & Codeforces Round #219 (Div. 2) | 6 | |

471 | Insertion Sort | Codeforces | Codeforces Round #212 (Div. 2) | 6 | |

472 | Number Transformation II | Codeforces | Codeforces Round #201 (Div. 1) & Codeforces Round #201 (Div. 2) | 6 | |

473 | Vasily the Bear and Fly | Codeforces | Codeforces Round #195 (Div. 2) | 6 | |

474 | Stadium and Games | Codeforces | MemSQL start[c]up Round 1 | 6 | |

475 | Rectangle Puzzle II | Codeforces | Codeforces Round #183 (Div. 1) & Codeforces Round #183 (Div. 2) | 6 | |

476 | Game on Tree | Codeforces | Codeforces Round #172 (Div. 1) & Codeforces Round #172 (Div. 2) | 6 | |

477 | Below the Diagonal | Codeforces | Codeforces Round #163 (Div. 2) | 6 | |

478 | Maxim and Restaurant | Codeforces | Codeforces Round #160 (Div. 1) & Codeforces Round #160 (Div. 2) | 6 | |

479 | Sum | Codeforces | Codeforces Round #159 (Div. 2) | 6 | |

480 | Party | Codeforces | Codeforces Beta Round #23 | 6 | |

481 | Functions | A2 Online Judge | 6 | ||

482 | Prizes | A2 Online Judge | 6 | ||

483 | Karen and Test | Codeforces | Codeforces Round #419 (Div. 1) & Codeforces Round #419 (Div. 2) | 6 | |

484 | Unusual Sequences | Codeforces | Codeforces Round #450 (Div. 2) | 6 | |

485 | ZS and The Birthday Paradox | Codeforces | Codeforces Round #369 (Div. 2) | 6 | |

486 | Fibonacci 2.0 | A2 Online Judge | 6 | ||

487 | Design Space | URI | 6 | ||

488 | Furlo and Rublo and Game | Codeforces | Codeforces Round #156 (Div. 2) & Codeforces Round #156 (Div. 1) | 7 | |

489 | Blackboard Fibonacci | Codeforces | Codeforces Round #134 (Div. 1) & Codeforces Round #134 (Div. 2) | 7 | |

490 | Little Elephant and Furik and Rubik | Codeforces | Codeforces Round #129 (Div. 1) & Codeforces Round #129 (Div. 2) | 7 | |

491 | Analyzing Polyline | Codeforces | Codeforces Round #123 (Div. 2) | 7 | |

492 | Pairs of Numbers | Codeforces | Codeforces Testing Round #3 | 7 | |

493 | Squares | Codeforces | Codeforces Beta Round #92 (Div. 1 Only) & Codeforces Beta Round #92 (Div. 2 Only) | 7 | |

494 | Reflection | Codeforces | Yandex.Algorithm 2011 Round 2 | 7 | |

495 | Plus and xor | Codeforces | All-Ukrainian School Olympiad in Informatics | 7 | |

496 | Big Maximum Sum | Codeforces | Codeforces Beta Round #67 (Div. 2) | 7 | |

497 | First Digit Law | Codeforces | Codeforces Beta Round #50 | 7 | |

498 | Disposition | Codeforces | Codeforces Beta Round #46 (Div. 2) | 7 | |

499 | Repaintings | Codeforces | Codeforces Beta Round #39 | 7 | |

500 | Sequence of points | Codeforces | Codeforces Beta Round #24 | 7 | |

501 | Intersection | Codeforces | Codeforces Alpha Round #21 (Codeforces format) | 7 | |

502 | Laser | Codeforces | Codeforces Beta Round #15 | 7 | |

503 | Follow Traffic Rules | Codeforces | Codeforces Beta Round #5 | 7 | |

504 | The Water Taps | SPOJ | 7 | ||

505 | On Corruption and Numbers | Codeforces | Codeforces Round #232 (Div. 2) | 7 | |

506 | Binary Table | Codeforces | CROC 2016 - Final Round [Private, For Onsite Finalists Only] | 7 | |

507 | Little Artem and Random Variable | Codeforces | VK Cup 2016 - Round 2 | 7 | |

508 | Turn | Codeforces | Experimental Educational Round: VolBIT Formulas Blitz | 7 | |

509 | Simple Skewness | Codeforces | 8VC Venture Cup 2016 - Elimination Round | 7 | |

510 | Rat Kwesh and Cheese | Codeforces | Codeforces Round #341 (Div. 2) | 7 | |

511 | Sum of Remainders | Codeforces | Educational Codeforces Round 5 | 7 | |

512 | Hexagons | Codeforces | Codeforces Round #338 (Div. 2) | 7 | |

513 | Case of a Top Secret | Codeforces | Codeforces Round #310 (Div. 1) | 7 | |

514 | Idempotent functions | Codeforces | VK Cup 2015 - Round 3 (unofficial online mirror, Div. 1 only) | 7 | |

515 | Restoring Numbers | Codeforces | Codeforces Round #289 (Div. 2, ACM ICPC Rules) | 7 | |

516 | Hack it! | Codeforces | Codeforces Round #268 (Div. 1) & Codeforces Round #268 (Div. 2) | 7 | |

517 | Devu and Birthday Celebration | Codeforces | Codeforces Round #251 (Div. 2) | 7 | |

518 | Square Table | Codeforces | RCC 2014 Warmup (Div. 2) & RCC 2014 Warmup (Div. 1) | 7 | |

519 | Curious Array | Codeforces | Codeforces Round #239 (Div. 1) & Codeforces Round #239 (Div. 2) | 7 | |

520 | On Sum of Fractions | Codeforces | Codeforces Round #232 (Div. 1) & Codeforces Round #232 (Div. 2) | 7 | |

521 | Blocked Points | Codeforces | Codeforces Round #230 (Div. 1) & Codeforces Round #230 (Div. 2) | 7 | |

522 | Subway Innovation | Codeforces | Codeforces Round #218 (Div. 2) | 7 | |

523 | Vasily the Bear and Beautiful Strings | Codeforces | Codeforces Round #195 (Div. 2) | 7 | |

524 | Minimum Modular | Codeforces | Codeforces Round #183 (Div. 1) & Codeforces Round #183 (Div. 2) | 7 | |

525 | Empire Strikes Back | Codeforces | Codeforces Round #181 (Div. 2) | 7 | |

526 | Playlist | Codeforces | Codeforces Round #164 (Div. 2) | 7 | |

527 | Maxim and Matrix | Codeforces | Codeforces Round #160 (Div. 1) & Codeforces Round #160 (Div. 2) | 7 | |

528 | The Last Fight Between Human and AI | Codeforces | Codeforces Round #354 (Div. 2) | 7 | |

529 | Powers | Live Archive | 2004 | Africa/Middle East - South Africa | 7 |

530 | Bamboo Partition | Codeforces | Codeforces Round #424 (Div. 1, rated, based on VK Cup Finals) & Codeforces Round #424 (Div. 2, rated, based on VK Cup Finals) | 7 | |

531 | String Mark | Codeforces | Codeforces Round #448 (Div. 2) | 7 | |

532 | Bribes | Codeforces | Bubble Cup 8 - Finals [Online Mirror] | 7 | |

533 | Little Elephant and Broken Sorting | Codeforces | Codeforces Round #157 (Div. 1) | 8 | |

534 | Anniversary | Codeforces | Codeforces Round #140 (Div. 1) & Codeforces Round #140 (Div. 2) | 8 | |

535 | Unsolvable | Codeforces | Codeforces Round #139 (Div. 2) | 8 | |

536 | Martian Luck | Codeforces | Codeforces Round #133 (Div. 2) | 8 | |

537 | Multicolored Marbles | Codeforces | VK Cup 2012 Finals, Practice Session | 8 | |

538 | Hamming Distance | Codeforces | Codeforces Round #122 (Div. 1) & Codeforces Round #122 (Div. 2) | 8 | |

539 | Headquarters | Codeforces | Croc Champ 2012 - Final | 8 | |

540 | Wizards and Numbers | Codeforces | Codeforces Round #114 (Div. 1) & Codeforces Round #114 (Div. 2) | 8 | |

541 | Smart Cheater | Codeforces | Codeforces Round #107 (Div. 1) & Codeforces Round #107 (Div. 2) | 8 | |

542 | Fibonacci Sums | Codeforces | Codeforces Beta Round #93 (Div. 1 Only) | 8 | |

543 | Plumber | Codeforces | Codeforces Beta Round #87 (Div. 1 Only) & Codeforces Beta Round #87 (Div. 2 Only) | 8 | |

544 | Vectors | Codeforces | Codeforces Beta Round #79 (Div. 1 Only) & Codeforces Beta Round #79 (Div. 2 Only) | 8 | |

545 | Numbers | Codeforces | Codeforces Beta Round #72 (Div. 1 Only) | 8 | |

546 | Capture Valerian | Codeforces | Codeforces Beta Round #57 (Div. 2) | 8 | |

547 | The Race | Codeforces | School Personal Contest #3 (Winter Computer School 2010/11) - Codeforces Beta Round #45 (ACM-ICPC Rules) | 8 | |

548 | Hyperdrive | Codeforces | School Team Contest #2 (Winter Computer School 2010/11) | 8 | |

549 | Collisions | Codeforces | Codeforces Beta Round #34 (Div. 2) | 8 | |

550 | Math Homework | A2 Online Judge | 8 | ||

551 | Lannion Visit | A2 Online Judge | 8 | ||

552 | Cowslip Collections | Codeforces | CROC 2016 - Elimination Round | 8 | |

553 | The Sum of the k-th Powers | Codeforces | Educational Codeforces Round 7 | 8 | |

554 | Vasya and Polynomial | Codeforces | Codeforces Round #281 (Div. 2) | 8 | |

555 | Strange Sorting | Codeforces | Codeforces Round #276 (Div. 1) & Codeforces Round #276 (Div. 2) | 8 | |

556 | Bear in the Field | Codeforces | Codeforces Round #226 (Div. 2) | 8 | |

557 | Dima and Magic Guitar | Codeforces | Codeforces Round #214 (Div. 2) | 8 | |

558 | Ghd | Codeforces | Codeforces Round #213 (Div. 1) | 8 | |

559 | GCD Table | Codeforces | Codeforces Round #196 (Div. 1) | 8 | |

560 | Summer Homework | Codeforces | ABBYY Cup 3.0 | 8 | |

561 | Interval Cubing | Codeforces | Codeforces Round #185 (Div. 1) | 8 | |

562 | Morning run | Codeforces | Croc Champ 2013 - Finals (online version, Div. 1) | 8 | |

563 | Olya and Graph | Codeforces | Codeforces Round #184 (Div. 2) | 8 | |

564 | Cube Problem | Codeforces | Croc Champ 2013 - Round 2 | 8 | |

565 | Ladies' Shop | Codeforces | Codeforces Round #176 (Div. 1) | 8 | |

566 | Positions in Permutations | Codeforces | Codeforces Round #175 (Div. 2) | 8 | |

567 | Cow Tennis Tournament | Codeforces | Codeforces Round #174 (Div. 1) | 8 | |

568 | Cows and Cool Sequences | Codeforces | Codeforces Round #174 (Div. 1) | 8 | |

569 | Three Horses | Codeforces | Codeforces Round #166 (Div. 2) | 8 | |

570 | More Queries to Array... | Codeforces | Codeforces Round #163 (Div. 2) | 8 | |

571 | BerDonalds | Codeforces | Codeforces Round #163 (Div. 2) | 8 | |

572 | Misha and Palindrome Degree | Codeforces | Codeforces Round #285 (Div. 2) & Codeforces Round #285 (Div. 1) | 8 | |

573 | Mother of Dragons | Codeforces | Codeforces Round #428 (Div. 2) | 8 | |

574 | Memory and Casinos | Codeforces | Codeforces Round #370 (Div. 2) | 8 | |

575 | Two Sets | Codeforces | Codeforces Round #153 (Div. 1) | 9 | |

576 | Endless Matrix | Codeforces | Codeforces Round #152 (Div. 1) | 9 | |

577 | Friends | Codeforces | Bayan 2012-2013 Elimination Round (ACM ICPC Rules, English statements) | 9 | |

578 | Little Elephant and Triangle | Codeforces | Codeforces Round #136 (Div. 1) | 9 | |

579 | Bitonix' Patrol | Codeforces | Codeforces Round #134 (Div. 1) | 9 | |

580 | Pixels | Codeforces | VK Cup 2012 Finals, Practice Session | 9 | |

581 | Tractor College | Codeforces | Codeforces Round #126 (Div. 2) | 9 | |

582 | Fibonacci Number | Codeforces | Codeforces Round #122 (Div. 1) | 9 | |

583 | LCM | Codeforces | Surprise Language Round #6 | 9 | |

584 | Visit of the Great | Codeforces | Codeforces Round #118 (Div. 1) | 9 | |

585 | Divisibility Rules | Codeforces | Codeforces Round #116 (Div. 2, ACM-ICPC Rules) | 9 | |

586 | Wizards and Bets | Codeforces | Codeforces Round #114 (Div. 1) | 9 | |

587 | Flatland Fencing | Codeforces | Codeforces Round #109 (Div. 1) | 9 | |

588 | Not Quick Transformation | Codeforces | Codeforces Beta Round #88 | 9 | |

589 | Rotation | Codeforces | Unknown Language Round #3 | 9 | |

590 | Winning Strategy | Codeforces | Yandex.Algorithm 2011 Finals | 9 | |

591 | Lostborn | Codeforces | Codeforces Beta Round #76 (Div. 1 Only) | 9 | |

592 | Flags | Codeforces | Codeforces Beta Round #76 (Div. 1 Only) | 9 | |

593 | Tetris revisited | Codeforces | Yandex.Algorithm 2011 Round 2 | 9 | |

594 | Archer's Shot | Codeforces | Codeforces Beta Round #70 (Div. 2) | 9 | |

595 | Morrowindows | Codeforces | Codeforces Beta Round #66 | 9 | |

596 | Extraordinarily Nice Numbers | Codeforces | Unknown Language Round #2 | 9 | |

597 | Table | Codeforces | Unknown Language Round #1 | 9 | |

598 | Mushroom Gnomes | Codeforces | Codeforces Beta Round #56 | 9 | |

599 | Savior | Codeforces | Codeforces Beta Round #56 | 9 | |

600 | Journey | Codeforces | Codeforces Beta Round #53 | 9 | |

601 | Square Equation Roots | Codeforces | Codeforces Beta Round #47 | 9 | |

602 | Strange town | Codeforces | Codeforces Beta Round #41 | 9 | |

603 | Berland Square | Codeforces | Codeforces Beta Round #39 | 9 | |

604 | Lesson Timetable | Codeforces | Codeforces Beta Round #37 | 9 | |

605 | Tetragon | Codeforces | Codeforces Beta Round #23 | 9 | |

606 | Four Divisors | Codeforces | Educational Codeforces Round 12 | 9 | |

607 | Gambling Nim | Codeforces | CROC 2016 - Final Round [Private, For Onsite Finalists Only] | 9 | |

608 | Bear and Paradox | Codeforces | VK Cup 2016 - Round 1 | 9 | |

609 | Ruminations on Ruminants | Codeforces | Codeforces Round #334 (Div. 1) | 9 | |

610 | Beautiful Function | Codeforces | Codeforces Round #329 (Div. 2) | 9 | |

611 | Task processing | Codeforces | 2015-2016 ACM-ICPC, NEERC, Southern Subregional Contest (Online Mirror, ACM-ICPC Rules, Teams Preferred) | 9 | |

612 | Present for Vitalik the Philatelist | Codeforces | Codeforces Round #325 (Div. 1) | 9 | |

613 | Fibonotci | Codeforces | Bubble Cup 8 - Finals [Online Mirror] | 9 | |

614 | Sign Posts | Codeforces | Codeforces Round #315 (Div. 1) | 9 | |

615 | Superhero's Job | Codeforces | VK Cup 2015 - Round 3 (unofficial online mirror, Div. 1 only) | 9 | |

616 | New York Hotel | Codeforces | Testing Round #11 | 9 | |

617 | Design Tutorial: Change the Goal | Codeforces | Codeforces Round #270 | 9 | |

618 | Appleman and Complicated Task | Codeforces | Codeforces Round #263 (Div. 1) | 9 | |

619 | Roland and Rose | Codeforces | Codeforces Round #262 (Div. 2) | 9 | |

620 | Physical Education and Buns | Codeforces | Codeforces Round #231 (Div. 2) | 9 | |

621 | Yet Another Number Sequence | Codeforces | Codeforces Round #230 (Div. 1) & Codeforces Round #230 (Div. 2) | 9 | |

622 | Fox and Perfect Sets | Codeforces | Codeforces Round #228 (Div. 1) | 9 | |

623 | Sereja and Cinema | Codeforces | Codeforces Round #223 (Div. 1) | 9 | |

624 | Red and Black Tree | Codeforces | Codeforces Round #221 (Div. 1) | 9 | |

625 | Theft of Blueprints | Codeforces | Codeforces Round #193 (Div. 2) | 9 | |

626 | Ciel and Flipboard | Codeforces | Codeforces Round #190 (Div. 1) | 9 | |

627 | Summer Homework | Codeforces | ABBYY Cup 3.0 | 9 | |

628 | PE Lesson | Codeforces | ABBYY Cup 3.0 | 9 | |

629 | Rotatable Number | Codeforces | Codeforces Round #183 (Div. 1) | 9 | |

630 | Ksusha and Square | Codeforces | Croc Champ 2013 - Round 2 | 9 | |

631 | Polo the Penguin and Lucky Numbers | Codeforces | Codeforces Round #177 (Div. 1) | 9 | |

632 | Donkey and Stars | Codeforces | Codeforces Round #152 (Div. 1) | 9 | |

633 | Cowboys | Codeforces | VK Cup 2012 Finals (unofficial online-version) | 9 | |

634 | Horse Races | Codeforces | Codeforces Beta Round #77 (Div. 1 Only) & Codeforces Beta Round #77 (Div. 2 Only) | 9 | |

635 | Optimal Point | Codeforces | Codeforces Round #359 (Div. 1) & Codeforces Round #359 (Div. 2) | 9 | |

636 | Subarray Cuts | Codeforces | Rockethon 2015 | 9 | |

637 | Lust | Codeforces | Codeforces Round #446 (Div. 1) | 9 | |

638 | Surprise me! | Codeforces | Codeforces Round #415 (Div. 1) | 9 | |

639 | Strange Radiation | Codeforces | Codeforces Round #425 (Div. 2) | 9 | |

640 | Ivan the Fool VS Gorynych the Dragon | Codeforces | School Personal Contest #3 (Winter Computer School 2010/11) - Codeforces Beta Round #45 (ACM-ICPC Rules) | 9 | |

641 | Birthday | Codeforces | Codeforces Beta Round #94 (Div. 1 Only) | 10 | |

642 | Sleeping | Codeforces | Codeforces Beta Round #86 (Div. 1 Only) | 10 | |

643 | Lucky Interval | Codeforces | Codeforces Beta Round #84 (Div. 1 Only) | 10 | |

644 | Interval Coloring | Codeforces | Unknown Language Round #3 | 10 | |

645 | Lamps in a Line | Codeforces | Unknown Language Round #3 | 10 | |

646 | Help Shrek and Donkey | Codeforces | Codeforces Beta Round #78 (Div. 1 Only) | 10 | |

647 | Long sequence | Codeforces | Yandex.Algorithm 2011 Round 2 | 10 | |

648 | Security System | Codeforces | Codeforces Beta Round #71 | 10 | |

649 | Mutation | Codeforces | All-Ukrainian School Olympiad in Informatics | 10 | |

650 | Oil | Codeforces | Unknown Language Round #2 | 10 | |

651 | Goshtasp, Vishtasp and Eidi | Codeforces | Unknown Language Round #2 | 10 | |

652 | Chess | Codeforces | Codeforces Beta Round #53 | 10 | |

653 | Interesting Sequence | Codeforces | Codeforces Beta Round #39 | 10 | |

654 | BigFibonacci | TopCoder | TCO06 Sponsor 5 - Div1 hard] (9916) | 10 | |

655 | Ants on a Circle | Codeforces | Educational Codeforces Round 10 | 10 | |

656 | Agricultural Archaeology | Codeforces | 2015-2016 ACM-ICPC, NEERC, Southern Subregional Contest (Online Mirror, ACM-ICPC Rules, Teams Preferred) | 10 | |

657 | Geometric Progressions | Codeforces | Codeforces Round #317 [AimFund Thanks-Round] (Div. 1) | 10 | |

658 | Sasha Circle | Codeforces | Looksery Cup 2015 | 10 | |

659 | Berserk Robot | Codeforces | Codeforces Round #300 | 10 | |

660 | Gears | Codeforces | Codeforces Round #283 (Div. 1) | 10 | |

661 | Permanent | Codeforces | Codeforces Round #268 (Div. 1) | 10 | |

662 | Flow Optimality | Codeforces | MemSQL Start[c]UP 2.0 - Round 2 | 10 | |

663 | Bingo! | Codeforces | MemSQL Start[c]UP 2.0 - Round 2 | 10 | |

664 | Jzzhu and Squares | Codeforces | Codeforces Round #257 (Div. 1) | 10 | |

665 | DZY Loves Bridges | Codeforces | Codeforces Round #255 (Div. 1) | 10 | |

666 | DZY Loves Games | Codeforces | Codeforces Round #255 (Div. 1) | 10 | |

667 | Hamming Triples | Codeforces | Codeforces Round #238 (Div. 1) | 10 | |

668 | Olympic Games | Codeforces | Codeforces Round #235 (Div. 2) | 10 | |

669 | Doodle Jump | Codeforces | Codeforces Round #201 (Div. 1) | 10 | |

670 | Counting Skyscrapers | Codeforces | MemSQL start[c]up Round 2 - online version | 10 | |

671 | Evil | Codeforces | Codeforces Round #192 (Div. 1) | 10 | |

672 | Sequence Transformation | Codeforces | Codeforces Round #172 (Div. 1) | 10 | |

673 | Berland Traffic | Codeforces | Codeforces Testing Round #5 | 10 | |

674 | DravDe saves the world | Codeforces | Codeforces Beta Round #28 (Codeforces format) | 10 | |

675 | Wisdom | Live Archive | 2004 | Africa/Middle East - South Africa | 10 |

676 | Nephren Runs a Cinema | Codeforces | Codeforces Round #449 (Div. 1) | 10 | |

677 | Mod Mod Mod | Codeforces | Codeforces Round #445 (Div. 1, based on Technocup 2018 Elimination Round 3) | 10 | |

678 | Perpetual Motion Machine | Codeforces | Codeforces Round #424 (Div. 1, rated, based on VK Cup Finals) | 10 | |

679 | Days of Floral Colours | Codeforces | Codeforces Round #431 (Div. 1) | 10 |