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

1 | Wine trading in Gergovia | SPOJ | 1 | ||

2 | All in All | UVA | 1 | ||

3 | Help the soldier | SPOJ | 1 | ||

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

5 | Team | Codeforces | Codeforces Round #143 (Div. 2) | 1 | |

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

7 | Twins | Codeforces | Codeforces Round #111 (Div. 2) | 1 | |

8 | Taxi | Codeforces | VK Cup 2012 Qualification Round 1 | 1 | |

9 | Chat room | Codeforces | Codeforces Beta Round #54 (Div. 2) | 1 | |

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

11 | Sale | Codeforces | Codeforces Beta Round #34 (Div. 2) | 1 | |

12 | Shortest path of the king | Codeforces | Codeforces Beta Round #3 | 1 | |

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

14 | Adding Reversed Numbers | SPOJ | 1 | ||

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

16 | Before an Exam | Codeforces | Codeforces Beta Round #4 (Div. 2 Only) | 1 | |

17 | Maximum Sum (II) | UVA | 1 | ||

18 | Dragon of Loowater | UVA | 1 | ||

19 | Shopaholic | UVA | 1 | ||

20 | The Bus Driver Problem | UVA | 1 | ||

21 | Chocolate | SPOJ | 1 | ||

22 | I AM VERY BUSY | SPOJ | 1 | ||

23 | DIE HARD | SPOJ | 1 | ||

24 | Optimal Array Multiplication Sequence | UVA | 1 | ||

25 | Bon Appetit | CodeChef | 1 | ||

26 | Tanya and Toys | Codeforces | Codeforces Round #346 (Div. 2) | 1 | |

27 | Beautiful Paintings | Codeforces | Codeforces Round #345 (Div. 2) | 1 | |

28 | Joysticks | Codeforces | Codeforces Round #345 (Div. 2) | 1 | |

29 | USB Flash Drives | Codeforces | Educational Codeforces Round 3 | 1 | |

30 | Wilbur and Array | Codeforces | Codeforces Round #331 (Div. 2) | 1 | |

31 | Duff and Meat | Codeforces | Codeforces Round #326 (Div. 2) | 1 | |

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

33 | Ilya and Diplomas | Codeforces | Codeforces Round #311 (Div. 2) | 1 | |

34 | Case of the Zeros and Ones | Codeforces | Codeforces Round #310 (Div. 2) | 1 | |

35 | Soldier and Badges | Codeforces | Codeforces Round #304 (Div. 2) | 1 | |

36 | Queue | Codeforces | Codeforces Round #303 (Div. 2) | 1 | |

37 | Woodcutters | Codeforces | Codeforces Round #303 (Div. 2) | 1 | |

38 | Equidistant String | Codeforces | Codeforces Round #303 (Div. 2) | 1 | |

39 | Quasi Binary | Codeforces | Codeforces Round #300 | 1 | |

40 | Vitaliy and Pie | Codeforces | Codeforces Round #297 (Div. 2) | 1 | |

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

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

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

44 | Chewba?ca and Number | Codeforces | Codeforces Round #291 (Div. 2) | 1 | |

45 | Anton and currency you all know | Codeforces | Codeforces Round #288 (Div. 2) | 1 | |

46 | Amr and Music | Codeforces | Codeforces Round #287 (Div. 2) | 1 | |

47 | Team Olympiad | Codeforces | Codeforces Round #279 (Div. 2) | 1 | |

48 | Given Length and Sum of Digits... | Codeforces | Codeforces Round #277.5 (Div. 2) | 1 | |

49 | BerSU Ball | Codeforces | Codeforces Round #277.5 (Div. 2) | 1 | |

50 | OR in Matrix | Codeforces | Codeforces Round #277 (Div. 2) | 1 | |

51 | Diverse Permutation | Codeforces | Codeforces Round #275 (Div. 1) & Codeforces Round #275 (Div. 2) | 1 | |

52 | Exams | Codeforces | Codeforces Round #274 (Div. 2) & Codeforces Round #274 (Div. 1) | 1 | |

53 | Table Decorations | Codeforces | Codeforces Round #273 (Div. 2) | 1 | |

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

55 | I Wanna Be the Guy | Codeforces | Codeforces Round #268 (Div. 2) | 1 | |

56 | Appleman and Toastman | Codeforces | Codeforces Round #263 (Div. 1) & Codeforces Round #263 (Div. 2) | 1 | |

57 | DZY Loves Strings | Codeforces | Codeforces Round #255 (Div. 2) | 1 | |

58 | Devu, the Singer and Churu, the Joker | Codeforces | Codeforces Round #251 (Div. 2) | 1 | |

59 | Choosing Teams | Codeforces | Codeforces Round #246 (Div. 2) | 1 | |

60 | Gravity Flip | Codeforces | Codeforces Round #238 (Div. 2) | 1 | |

61 | Team | Codeforces | Codeforces Round #235 (Div. 2) | 1 | |

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

63 | Bear and Raspberry | Codeforces | Codeforces Round #226 (Div. 2) | 1 | |

64 | Sereja and Dima | Codeforces | Codeforces Round #223 (Div. 2) | 1 | |

65 | TL | Codeforces | Codeforces Round #203 (Div. 2) | 1 | |

66 | Cinema Line | Codeforces | Codeforces Round #202 (Div. 2) | 1 | |

67 | Helpful Maths | Codeforces | Codeforces Round #197 (Div. 2) | 1 | |

68 | Puzzles | Codeforces | Codeforces Round #196 (Div. 2) | 1 | |

69 | Magic Numbers | Codeforces | Codeforces Round #189 (Div. 2) | 1 | |

70 | Building Permutation | Codeforces | Codeforces Round #175 (Div. 2) | 1 | |

71 | Slightly Decreasing Permutations | Codeforces | Codeforces Round #175 (Div. 2) | 1 | |

72 | Little Girl and Game | Codeforces | Codeforces Round #169 (Div. 2) | 1 | |

73 | Roadside Trees (Simplified Edition) | Codeforces | Codeforces Round #162 (Div. 2) | 1 | |

74 | Business trip | Codeforces | Codeforces Round #106 (Div. 2) | 1 | |

75 | At most twice | Live Archive | 2015 | Latin America | 1 |

76 | Expedition | SPOJ | 1 | ||

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

78 | Mahmoud and a Triangle | Codeforces | Codeforces Round #396 (Div. 2) | 1 | |

79 | Anton and Classes | Codeforces | Codeforces Round #404 (Div. 2) | 1 | |

80 | Vladik and flights | Codeforces | Codeforces Round #384 (Div. 2) | 1 | |

81 | Patrick and Shopping | Codeforces | Codeforces Round #332 (Div. 2) | 1 | |

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

83 | The Stern-Brocot Number System | UVA | 1 | ||

84 | Train TimeTable | SPOJ | 2 | ||

85 | Station Balance | UVA | 2 | ||

86 | Ambitious Manager | SPOJ | 2 | ||

87 | Boys and Girls | Codeforces | Codeforces Round #154 (Div. 2) | 2 | |

88 | Points on Line | Codeforces | Codeforces Round #153 (Div. 1) & Codeforces Round #153 (Div. 2) | 2 | |

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

90 | Buggy Sorting | Codeforces | Codeforces Round #151 (Div. 2) | 2 | |

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

92 | Airport | Codeforces | Codeforces Round #134 (Div. 2) | 2 | |

93 | Unlucky Ticket | Codeforces | Codeforces Round #111 (Div. 2) | 2 | |

94 | Combination | Codeforces | Codeforces Round #109 (Div. 2) | 2 | |

95 | Lucky Conversion | Codeforces | Codeforces Round #104 (Div. 1) & Codeforces Round #104 (Div. 2) | 2 | |

96 | Permutation | Codeforces | Codeforces Beta Round #98 (Div. 2) | 2 | |

97 | Little Pigs and Wolves | Codeforces | Codeforces Beta Round #87 (Div. 2 Only) | 2 | |

98 | Coins | Codeforces | Codeforces Beta Round #54 (Div. 2) | 2 | |

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

100 | Dynamic Frog | UVA | 2 | ||

101 | Saruman of Many Colours | SPOJ | 2 | ||

102 | Watering Grass | UVA | 2 | ||

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

104 | Cupboards | Codeforces | Codeforces Round #152 (Div. 2) | 2 | |

105 | Making a String | Codeforces | AIM Tech Round (Div. 2) | 2 | |

106 | Dinner with Emma | Codeforces | Educational Codeforces Round 5 | 2 | |

107 | Sorting Railway Cars | Codeforces | Codeforces Round #335 (Div. 1) & Codeforces Round #335 (Div. 2) | 2 | |

108 | More Cowbell | Codeforces | Codeforces Round #334 (Div. 2) | 2 | |

109 | Alternative Thinking | Codeforces | Codeforces Round #334 (Div. 1) & Codeforces Round #334 (Div. 2) | 2 | |

110 | Duff and Weight Lifting | Codeforces | Codeforces Round #326 (Div. 1) & Codeforces Round #326 (Div. 2) | 2 | |

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

112 | Inventory | Codeforces | Codeforces Round #315 (Div. 2) | 2 | |

113 | Mike and Fun | Codeforces | Codeforces Round #305 (Div. 2) | 2 | |

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

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

116 | Pasha and String | Codeforces | Codeforces Round #297 (Div. 2) | 2 | |

117 | Painting Pebbles | Codeforces | Codeforces Round #289 (Div. 2, ACM ICPC Rules) | 2 | |

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

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

120 | Vanya and Exams | Codeforces | Codeforces Round #280 (Div. 2) | 2 | |

121 | Palindrome Transformation | Codeforces | Codeforces Round #277 (Div. 2) | 2 | |

122 | Valuable Resources | Codeforces | Codeforces Round #276 (Div. 2) | 2 | |

123 | Towers | Codeforces | Codeforces Round #274 (Div. 2) | 2 | |

124 | Design Tutorial: Make It Nondeterministic | Codeforces | Codeforces Round #270 | 2 | |

125 | 24 Game | Codeforces | Codeforces Round #268 (Div. 1) & Codeforces Round #268 (Div. 2) | 2 | |

126 | Appleman and Card Game | Codeforces | Codeforces Round #263 (Div. 2) | 2 | |

127 | DZY Loves Chemistry | Codeforces | Codeforces Round #254 (Div. 2) | 2 | |

128 | The Child and Toy | Codeforces | Codeforces Round #250 (Div. 2) & Codeforces Round #250 (Div. 1) | 2 | |

129 | Football Kit | Codeforces | Codeforces Round #246 (Div. 2) | 2 | |

130 | Fox and Cross | Codeforces | Codeforces Round #228 (Div. 2) | 2 | |

131 | Fox and Box Accumulation | Codeforces | Codeforces Round #228 (Div. 1) & Codeforces Round #228 (Div. 2) | 2 | |

132 | George and Round | Codeforces | Codeforces Round #227 (Div. 2) | 2 | |

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

134 | Ksenia and Pan Scales | Codeforces | Codeforces Round #224 (Div. 2) | 2 | |

135 | New Year Ratings Change | Codeforces | Good Bye 2013 | 2 | |

136 | Counting Kangaroos is Fun | Codeforces | Codeforces Round #219 (Div. 1) & Codeforces Round #219 (Div. 2) | 2 | |

137 | Fixing Typos | Codeforces | Codeforces Round #211 (Div. 2) | 2 | |

138 | Table | Codeforces | Codeforces Round #209 (Div. 2) | 2 | |

139 | Group of Students | Codeforces | Codeforces Round #207 (Div. 2) | 2 | |

140 | Color the Fence | Codeforces | Codeforces Round #202 (Div. 2) | 2 | |

141 | Alternating Current | Codeforces | Codeforces Round #200 (Div. 1) & Codeforces Round #200 (Div. 2) | 2 | |

142 | Xenia and Divisors | Codeforces | Codeforces Round #199 (Div. 2) | 2 | |

143 | Ciel and Dancing | Codeforces | Codeforces Round #190 (Div. 2) | 2 | |

144 | Sail | Codeforces | Codeforces Round #180 (Div. 2) | 2 | |

145 | Polo the Penguin and Strings | Codeforces | Codeforces Round #177 (Div. 1) & Codeforces Round #177 (Div. 2) | 2 | |

146 | k-Multiple Free Set | Codeforces | Codeforces Round #168 (Div. 1) & Codeforces Round #168 (Div. 2) | 2 | |

147 | Squares | Codeforces | Codeforces Round #161 (Div. 2) | 2 | |

148 | Alice, Bob and Chocolate | Codeforces | Codeforces Beta Round #6 (Div. 2 Only) | 2 | |

149 | Removing Columns | Codeforces | Codeforces Round #283 (Div. 2) & Codeforces Round #283 (Div. 1) | 2 | |

150 | Fox And Names | Codeforces | Codeforces Round #290 (Div. 2) & Codeforces Round #290 (Div. 1) | 2 | |

151 | Milk Scheduling | SPOJ | 2 | ||

152 | Little Elephant and Music | CodeChef | 2 | ||

153 | Planning | Codeforces | Codeforces Round #433 (Div. 1, based on Olympiad of Metropolises) & Codeforces Round #433 (Div. 2, based on Olympiad of Metropolises) | 2 | |

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

155 | String Game | Codeforces | Codeforces Round #402 (Div. 1) & Codeforces Round #402 (Div. 2) | 2 | |

156 | Alyona and mex | Codeforces | Codeforces Round #381 (Div. 1) & Codeforces Round #381 (Div. 2) | 2 | |

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

158 | Valued Keys | Codeforces | Codeforces Round #409 (rated, Div. 2, based on VK Cup 2017 Round 2) | 2 | |

159 | Urbanization | Codeforces | Codeforces Round #382 (Div. 2) | 2 | |

160 | Game of Credit Cards | Codeforces | Codeforces Round #401 (Div. 2) | 2 | |

161 | Lesha and array splitting | Codeforces | Codeforces Round #390 (Div. 2) | 2 | |

162 | Summer sell-off | Codeforces | Codeforces Round #415 (Div. 2) | 2 | |

163 | Not Afraid | Codeforces | Codeforces Round #406 (Div. 2) | 2 | |

164 | Our Tanya is Crying Out Loud | Codeforces | Codeforces Round #466 (Div. 2) | 2 | |

165 | Conan and Agasa play a Card Game | Codeforces | Codecraft-18 and Codeforces Round #458 (Div. 1 + Div. 2, combined) | 2 | |

166 | Coin Collector | UVA | 2 | ||

167 | Color Stripe | Codeforces | Codeforces Round #135 (Div. 2) | 3 | |

168 | Photographer | Codeforces | Codeforces Round #128 (Div. 2) | 3 | |

169 | LLPS | Codeforces | Codeforces Round #127 (Div. 2) | 3 | |

170 | Lexicographically Maximum Subsequence | Codeforces | Codeforces Round #124 (Div. 1) & Codeforces Round #124 (Div. 2) | 3 | |

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

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

173 | Dress'em in Vests! | Codeforces | VK Cup 2012 Round 1 | 3 | |

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

175 | Petya and Inequiations | Codeforces | Codeforces Beta Round #85 (Div. 1 Only) & Codeforces Beta Round #85 (Div. 2 Only) | 3 | |

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

177 | Regular Bracket Sequence | Codeforces | Codeforces Beta Round #26 (Codeforces format) | 3 | |

178 | Burglar and Matches | Codeforces | Codeforces Beta Round #16 (Div. 2 Only) | 3 | |

179 | Longest Regular Bracket Sequence | Codeforces | Codeforces Beta Round #5 | 3 | |

180 | Greedy Hydra | SPOJ | 3 | ||

181 | Football | UVA | 3 | ||

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

183 | Ilya and Matrix | Codeforces | Codeforces Round #186 (Div. 2) | 3 | |

184 | Sockets | Codeforces | Codeforces Round #159 (Div. 2) | 3 | |

185 | Simple Strings | Codeforces | Educational Codeforces Round 12 | 3 | |

186 | Co-prime Array | Codeforces | Educational Codeforces Round 11 | 3 | |

187 | New Reform | Codeforces | Codeforces Round #346 (Div. 2) | 3 | |

188 | Bear and String Distance | Codeforces | Educational Codeforces Round 8 | 3 | |

189 | Block Towers | Codeforces | 8VC Venture Cup 2016 - Elimination Round | 3 | |

190 | Pearls in a Row | Codeforces | Educational Codeforces Round 6 | 3 | |

191 | Marina and Vasya | Codeforces | Codeforces Round #324 (Div. 2) | 3 | |

192 | "Or" Game | Codeforces | Codeforces Round #320 (Div. 1) [Bayan Thanks-Round] & Codeforces Round #320 (Div. 2) [Bayan Thanks-Round] | 3 | |

193 | Order Book | Codeforces | Codeforces Round #317 [AimFund Thanks-Round] (Div. 2) | 3 | |

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

195 | School Marks | Codeforces | Codeforces Round #301 (Div. 2) | 3 | |

196 | Error Correct System | Codeforces | Codeforces Round #296 (Div. 2) | 3 | |

197 | Om Nom and Dark Park | Codeforces | ZeptoLab Code Rush 2015 | 3 | |

198 | Ilya and Sticks | Codeforces | Codeforces Round #297 (Div. 2) | 3 | |

199 | Anya and Ghosts | Codeforces | Codeforces Round #288 (Div. 2) | 3 | |

200 | Misha and Forest | Codeforces | Codeforces Round #285 (Div. 2) & Codeforces Round #285 (Div. 1) | 3 | |

201 | Treasure | Codeforces | Codeforces Round #282 (Div. 1) & Codeforces Round #282 (Div. 2) | 3 | |

202 | Long Jumps | Codeforces | Codeforces Round #274 (Div. 2) & Codeforces Round #274 (Div. 1) | 3 | |

203 | No to Palindromes! | Codeforces | Codeforces Round #265 (Div. 1) & Codeforces Round #265 (Div. 2) | 3 | |

204 | Gargari and Bishops | Codeforces | Codeforces Round #264 (Div. 2) | 3 | |

205 | Present | Codeforces | Codeforces Round #262 (Div. 2) | 3 | |

206 | Painting Fence | Codeforces | Codeforces Round #256 (Div. 2) | 3 | |

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

208 | Valera and Fruits | Codeforces | Codeforces Round #252 (Div. 2) | 3 | |

209 | The Child and Set | Codeforces | Codeforces Round #250 (Div. 2) | 3 | |

210 | Pasha Maximizes | Codeforces | Codeforces Round #249 (Div. 2) | 3 | |

211 | Megacity | Codeforces | Codeforces Round #242 (Div. 2) | 3 | |

212 | Booking System | Codeforces | Codeforces Round #241 (Div. 2) | 3 | |

213 | Guess a number! | Codeforces | Codeforces Round #241 (Div. 2) | 3 | |

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

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

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

217 | Milking cows | Codeforces | Codeforces Round #225 (Div. 1) & Codeforces Round #225 (Div. 2) | 3 | |

218 | Sereja and Stairs | Codeforces | Codeforces Round #223 (Div. 2) | 3 | |

219 | Vasya and Public Transport | Codeforces | Codeforces Round #206 (Div. 2) | 3 | |

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

221 | Bombs | Codeforces | Codeforces Round #203 (Div. 2) | 3 | |

222 | Xenia and Weights | Codeforces | Codeforces Round #197 (Div. 2) | 3 | |

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

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

225 | Secrets | Codeforces | Codeforces Round #194 (Div. 1) & Codeforces Round #194 (Div. 2) | 3 | |

226 | Purification | Codeforces | Codeforces Round #192 (Div. 1) & Codeforces Round #192 (Div. 2) | 3 | |

227 | Snow Footprints | Codeforces | Codeforces Round #180 (Div. 2) | 3 | |

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

229 | Multithreading | Codeforces | Codeforces Round #165 (Div. 2) | 3 | |

230 | Roma and Changing Signs | Codeforces | Codeforces Round #160 (Div. 2) | 3 | |

231 | Maxim and Discounts | Codeforces | Codeforces Round #160 (Div. 1) & Codeforces Round #160 (Div. 2) | 3 | |

232 | Playing Cubes | Codeforces | Codeforces Round #159 (Div. 2) | 3 | |

233 | Dice Tower | Codeforces | Codeforces Round #139 (Div. 2) | 3 | |

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

235 | Recycling Bottles | Codeforces | Codeforces Round #352 (Div. 1) & Codeforces Round #352 (Div. 2) | 3 | |

236 | Heap Operations | Codeforces | Codeforces Round #357 (Div. 2) | 3 | |

237 | Santa Claus and Robot | Codeforces | Technocup 2017 - Elimination Round 3 | 3 | |

238 | Karen and Game | Codeforces | Codeforces Round #419 (Div. 1) & Codeforces Round #419 (Div. 2) | 3 | |

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

240 | Voting | Codeforces | Codeforces Round #388 (Div. 2) | 3 | |

241 | Cloud of Hashtags | Codeforces | Codeforces Round #401 (Div. 2) | 3 | |

242 | Mike and gcd problem | Codeforces | Codeforces Round #410 (Div. 2) | 3 | |

243 | Palindromes | Live Archive | 1995 | North America - South Central USA | 3 |

244 | Paper Work | Codeforces | CROC-MBTU 2012, Final Round (Online version, Div. 2) | 4 | |

245 | Magic, Wizardry and Wonders | Codeforces | Codeforces Round #143 (Div. 2) | 4 | |

246 | Well-known Numbers | Codeforces | Codeforces Round #139 (Div. 2) | 4 | |

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

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

249 | Little Elephant and Sorting | Codeforces | Codeforces Round #129 (Div. 2) | 4 | |

250 | Growing Mushrooms | Codeforces | Codeforces Round #118 (Div. 2) | 4 | |

251 | Matchmaker | Codeforces | VK Cup 2012 Qualification Round 2 | 4 | |

252 | Friends or Not | Codeforces | VK Cup 2012 Qualification Round 2 | 4 | |

253 | Hometask | Codeforces | Codeforces Round #109 (Div. 1) & Codeforces Round #109 (Div. 2) | 4 | |

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

255 | New Year Snowmen | Codeforces | Codeforces Round #100 | 4 | |

256 | Homework | Codeforces | Codeforces Beta Round #79 (Div. 1 Only) & Codeforces Beta Round #79 (Div. 2 Only) | 4 | |

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

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

259 | Bus Game | Codeforces | Codeforces Beta Round #71 | 4 | |

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

261 | Eternal Victory | Codeforces | Codeforces Beta Round #57 (Div. 2) | 4 | |

262 | Lucky Tickets | Codeforces | Codeforces Beta Round #42 (Div. 2) | 4 | |

263 | You're Given a String... | Codeforces | Codeforces Beta Round #23 | 4 | |

264 | Lorry | Codeforces | Codeforces Beta Round #3 | 4 | |

265 | INVITATION FOR TECHOFES | SPOJ | 4 | ||

266 | Jersey Politics | PKU | 4 | ||

267 | Troops of Sand Monsters | SPOJ | 4 | ||

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

269 | Subtraction | A2 Online Judge | 4 | ||

270 | K-Palindrome | A2 Online Judge | 4 | ||

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

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

273 | Make Palindrome | Codeforces | Educational Codeforces Round 2 | 4 | |

274 | Amr and Chemistry | Codeforces | Codeforces Round #312 (Div. 2) | 4 | |

275 | Arthur and Table | Codeforces | Codeforces Round #311 (Div. 2) | 4 | |

276 | Case of Fugitive | Codeforces | Codeforces Round #310 (Div. 1) & Codeforces Round #310 (Div. 2) | 4 | |

277 | GukiZ hates Boxes | Codeforces | Codeforces Round #307 (Div. 2) | 4 | |

278 | Paths and Trees | Codeforces | Codeforces Round #303 (Div. 2) | 4 | |

279 | Tavas and Malekas | Codeforces | Codeforces Round #299 (Div. 2) & Codeforces Round #299 (Div. 1) | 4 | |

280 | Clique Problem | Codeforces | Codeforces Round #296 (Div. 2) & Codeforces Round #296 (Div. 1) | 4 | |

281 | Drazil and Tiles | Codeforces | Codeforces Round #292 (Div. 2) & Codeforces Round #292 (Div. 1) | 4 | |

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

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

284 | Two Sets | Codeforces | Codeforces Round #268 (Div. 1) & Codeforces Round #268 (Div. 2) | 4 | |

285 | DZY Loves Modification | Codeforces | Codeforces Round #255 (Div. 1) & Codeforces Round #255 (Div. 2) | 4 | |

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

287 | Feed with Candy | Codeforces | Zepto Code Rush 2014 | 4 | |

288 | Network Configuration | Codeforces | Coder-Strike 2014 - Round 1 | 4 | |

289 | Poster | Codeforces | Coder-Strike 2014 - Round 1 | 4 | |

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

291 | Multitasking | Codeforces | Codeforces Round #225 (Div. 2) | 4 | |

292 | Inna and Nine | Codeforces | Codeforces Round #220 (Div. 2) | 4 | |

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

294 | Xenia and Spies | Codeforces | Codeforces Round #199 (Div. 2) | 4 | |

295 | Ciel the Commander | Codeforces | Codeforces Round #190 (Div. 1) & Codeforces Round #190 (Div. 2) | 4 | |

296 | Special Task | Codeforces | ABBYY Cup 3.0 | 4 | |

297 | Fish Weight | Codeforces | Codeforces Round #180 (Div. 1) & Codeforces Round #180 (Div. 2) | 4 | |

298 | Shaass and Bookshelf | Codeforces | Codeforces Round #178 (Div. 2) | 4 | |

299 | Zero Tree | Codeforces | Codeforces Round #168 (Div. 1) & Codeforces Round #168 (Div. 2) | 4 | |

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

301 | Tournament | Codeforces | Codeforces Beta Round #27 (Codeforces format, Div. 2) | 4 | |

302 | Robin Hood | Codeforces | Codeforces Round #352 (Div. 1) & Codeforces Round #352 (Div. 2) | 4 | |

303 | Money Transfers | Codeforces | Codeforces Round #353 (Div. 2) | 4 | |

304 | Office Keys | Codeforces | Codeforces Round #424 (Div. 1, rated, based on VK Cup Finals) & Codeforces Round #424 (Div. 2, rated, based on VK Cup Finals) | 4 | |

305 | Garland | Codeforces | Codeforces Round #398 (Div. 2) | 4 | |

306 | Game of the Rows | Codeforces | Codeforces Round #428 (Div. 2) | 4 | |

307 | Text Editor | Codeforces | Codeforces Round #154 (Div. 2) | 5 | |

308 | Beauty Pageant | Codeforces | Codeforces Round #151 (Div. 2) | 5 | |

309 | Restoring Table | Codeforces | CROC-MBTU 2012, Elimination Round (ACM-ICPC) | 5 | |

310 | Old Peykan | Codeforces | Bayan 2012-2013 Elimination Round (ACM ICPC Rules, English statements) | 5 | |

311 | Cycles | Codeforces | Codeforces Round #144 (Div. 1) & Codeforces Round #144 (Div. 2) | 5 | |

312 | Olympiad | Codeforces | Codeforces Round #137 (Div. 2) | 5 | |

313 | Permutations | Codeforces | Codeforces Round #119 (Div. 1) & Codeforces Round #119 (Div. 2) | 5 | |

314 | Replacing Digits | Codeforces | VK Cup 2012 Round 2 (Unofficial Div. 2 Edition) | 5 | |

315 | Discounts | Codeforces | VK Cup 2012 Round 1 | 5 | |

316 | Terse princess | Codeforces | Codeforces Round #105 (Div. 2) | 5 | |

317 | Help General | Codeforces | Codeforces Round #102 (Div. 1) & Codeforces Round #102 (Div. 2) | 5 | |

318 | Queue | Codeforces | Codeforces Round #101 (Div. 2) | 5 | |

319 | New Year Contest | Codeforces | Codeforces Round #100 | 5 | |

320 | Spiders | Codeforces | School Regional Team Contest, Saratov, 2011 | 5 | |

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

322 | Lawnmower | Codeforces | Codeforces Beta Round #87 (Div. 1 Only) & Codeforces Beta Round #87 (Div. 2 Only) | 5 | |

323 | Newspaper Headline | Codeforces | Codeforces Beta Round #75 (Div. 1 Only) & Codeforces Beta Round #75 (Div. 2 Only) | 5 | |

324 | Bets | Codeforces | Codeforces Beta Round #63 (Div. 2) | 5 | |

325 | Square Earth? | Codeforces | Codeforces Beta Round #53 | 5 | |

326 | What is for dinner? | Codeforces | Codeforces Beta Round #33 (Codeforces format) | 5 | |

327 | Hierarchy | Codeforces | Codeforces Beta Round #17 | 5 | |

328 | Least Cost Bracket Sequence | Codeforces | Codeforces Beta Round #3 | 5 | |

329 | Unordered Subsequence | Codeforces | Codeforces Beta Round #27 (Codeforces format, Div. 2) | 5 | |

330 | Game with Points | SGU | 5 | ||

331 | Simple Subset | Codeforces | Educational Codeforces Round 12 | 5 | |

332 | Running with Obstacles | Codeforces | VK Cup 2016 - Qualification Round 1 | 5 | |

333 | Running Track | Codeforces | Codeforces Round #338 (Div. 2) | 5 | |

334 | Restaurant | Codeforces | Testing Round #12 | 5 | |

335 | Wilbur and Points | Codeforces | Codeforces Round #331 (Div. 2) | 5 | |

336 | Gourmet and Banquet | Codeforces | 2015-2016 ACM-ICPC, NEERC, Southern Subregional Contest (Online Mirror, ACM-ICPC Rules, Teams Preferred) | 5 | |

337 | Points on Plane | Codeforces | Codeforces Round #319 (Div. 1) & Codeforces Round #319 (Div. 2) | 5 | |

338 | Minimization | Codeforces | Codeforces Round #317 [AimFund Thanks-Round] (Div. 1) & Codeforces Round #317 [AimFund Thanks-Round] (Div. 2) | 5 | |

339 | Happy Line | Codeforces | Looksery Cup 2015 | 5 | |

340 | Haar Features | Codeforces | Looksery Cup 2015 | 5 | |

341 | Handshakes | Codeforces | Codeforces Round #298 (Div. 2) | 5 | |

342 | Correcting Mistakes | Codeforces | VK Cup 2015 - Round 2 (unofficial online mirror, Div. 1 only) | 5 | |

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

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

345 | Name Quest | Codeforces | VK Cup 2015 - Qualification Round 2 | 5 | |

346 | Sums of Digits | Codeforces | Codeforces Round #289 (Div. 2, ACM ICPC Rules) | 5 | |

347 | Dungeons and Candies | Codeforces | Zepto Code Rush 2014 | 5 | |

348 | Prime Swaps | Codeforces | Codeforces Round #246 (Div. 2) | 5 | |

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

350 | Fox and Card Game | Codeforces | Codeforces Round #228 (Div. 1) & Codeforces Round #228 (Div. 2) | 5 | |

351 | George and Number | Codeforces | Codeforces Round #227 (Div. 2) | 5 | |

352 | Preparing for the Contest | Codeforces | Codeforces Round #222 (Div. 1) & Codeforces Round #222 (Div. 2) | 5 | |

353 | Inna and Pink Pony | Codeforces | Codeforces Round #220 (Div. 2) | 5 | |

354 | Renting Bikes | Codeforces | Codeforces Round #211 (Div. 2) | 5 | |

355 | Levko and Array Recovery | Codeforces | Codeforces Round #210 (Div. 1) & Codeforces Round #210 (Div. 2) | 5 | |

356 | Dima and Hares | Codeforces | Codeforces Round #208 (Div. 2) | 5 | |

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

358 | Read Time | Codeforces | Codeforces Round #200 (Div. 1) & Codeforces Round #200 (Div. 2) | 5 | |

359 | Vasily the Bear and Sequence | Codeforces | Codeforces Round #195 (Div. 2) | 5 | |

360 | Chips | Codeforces | Codeforces Round #194 (Div. 1) & Codeforces Round #194 (Div. 2) | 5 | |

361 | Ciel and Duel | Codeforces | Codeforces Round #190 (Div. 1) & Codeforces Round #190 (Div. 2) | 5 | |

362 | Weird Game | Codeforces | Croc Champ 2013 - Round 2 | 5 | |

363 | Parallel Programming | Codeforces | Croc Champ 2013 - Qualification Round | 5 | |

364 | Balls and Boxes | Codeforces | Codeforces Round #158 (Div. 2) | 5 | |

365 | Guilty --- to the kitchen! | Codeforces | Codeforces Beta Round #41 | 5 | |

366 | Bear and Tower of Cubes | Codeforces | Codeforces Round #356 (Div. 1) & Codeforces Round #356 (Div. 2) | 5 | |

367 | Jury Meeting | Codeforces | Codeforces Round #433 (Div. 1, based on Olympiad of Metropolises) & Codeforces Round #433 (Div. 2, based on Olympiad of Metropolises) | 5 | |

368 | An overnight dance in discotheque | Codeforces | Codeforces Round #418 (Div. 2) | 5 | |

369 | Hanoi Factory | Codeforces | Codeforces Round #401 (Div. 2) | 5 | |

370 | Cartons of milk | Codeforces | Codeforces Round #398 (Div. 2) | 5 | |

371 | The Queue | Codeforces | Codeforces Round #398 (Div. 2) | 5 | |

372 | Fedor and coupons | Codeforces | Codeforces Round #390 (Div. 2) | 5 | |

373 | Maxim and Array | Codeforces | Codeforces Round #374 (Div. 2) | 5 | |

374 | Anagram | Codeforces | Codeforces Round #155 (Div. 2) | 6 | |

375 | Movie Critics | Codeforces | CROC-MBTU 2012, Final Round (Online version, Div. 2) | 6 | |

376 | Game with Coins | Codeforces | CROC-MBTU 2012, Elimination Round (ACM-ICPC) | 6 | |

377 | Dispute | Codeforces | Codeforces Round #149 (Div. 2) | 6 | |

378 | Towers | Codeforces | Codeforces Round #142 (Div. 1) | 6 | |

379 | Naughty Stone Piles | Codeforces | Codeforces Round #140 (Div. 1) & Codeforces Round #140 (Div. 2) | 6 | |

380 | Hiring Staff | Codeforces | Codeforces Round #133 (Div. 2) | 6 | |

381 | Hot Days | Codeforces | Codeforces Round #132 (Div. 2) | 6 | |

382 | Game | Codeforces | Codeforces Round #131 (Div. 1) & Codeforces Round #131 (Div. 2) | 6 | |

383 | Trading Business | Codeforces | Croc Champ 2012 - Round 2 | 6 | |

384 | File List | Codeforces | VK Cup 2012 Round 3 (Unofficial Div. 2 Edition) | 6 | |

385 | New Year Cards | Codeforces | Codeforces Round #100 | 6 | |

386 | Zero-One | Codeforces | Codeforces Beta Round #97 (Div. 1) & Codeforces Beta Round #97 (Div. 2) | 6 | |

387 | Robbery | Codeforces | Codeforces Beta Round #74 (Div. 1 Only) & Codeforces Beta Round #74 (Div. 2 Only) | 6 | |

388 | Beaver | Codeforces | Codeforces Beta Round #71 | 6 | |

389 | Train | Codeforces | Codeforces Beta Round #68 | 6 | |

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

391 | Text Messaging | Codeforces | Codeforces Beta Round #64 | 6 | |

392 | Partial Teacher | Codeforces | Manthan 2011 | 6 | |

393 | Harry Potter and the History of Magic | Codeforces | Codeforces Beta Round #60 | 6 | |

394 | Permutations | Codeforces | School Personal Contest #3 (Winter Computer School 2010/11) - Codeforces Beta Round #45 (ACM-ICPC Rules) | 6 | |

395 | 3-cycles | Codeforces | Codeforces Beta Round #40 (Div. 2) | 6 | |

396 | Company Income Growth | Codeforces | School Team Contest #1 (Winter Computer School 2010/11) | 6 | |

397 | Animals | Codeforces | Codeforces Beta Round #35 (Div. 2) | 6 | |

398 | Segments | Codeforces | Codeforces Beta Round #22 (Div. 2 Only) | 6 | |

399 | Washer, Dryer, Folder | Codeforces | MemSQL Start[c]UP 2.0 - Round 1 | 6 | |

400 | Train Passengers | A2 Online Judge | 6 | ||

401 | Fishing Soldier | A2 Online Judge | 6 | ||

402 | Snakes | A2 Online Judge | 6 | ||

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

404 | Table Compression | Codeforces | Codeforces Round #345 (Div. 1) & Codeforces Round #345 (Div. 2) | 6 | |

405 | Array GCD | Codeforces | AIM Tech Round (Div. 1) & AIM Tech Round (Div. 2) | 6 | |

406 | Ants in Leaves | Codeforces | Educational Codeforces Round 7 | 6 | |

407 | Anton and Ira | Codeforces | Codeforces Round #324 (Div. 2) | 6 | |

408 | Invariance of Tree | Codeforces | Codeforces Round #319 (Div. 1) & Codeforces Round #319 (Div. 2) | 6 | |

409 | Vanya and Brackets | Codeforces | Codeforces Round #308 (Div. 2) | 6 | |

410 | Brackets in Implications | Codeforces | Codeforces Round #306 (Div. 2) | 6 | |

411 | Looksery Party | Codeforces | Looksery Cup 2015 | 6 | |

412 | Arthur and Walls | Codeforces | Codeforces Round #297 (Div. 2) | 6 | |

413 | ???? ?? ?????? - 2 (round version) | Codeforces | VK Cup 2015 - Round 1 | 6 | |

414 | Cubes | Codeforces | Codeforces Round #295 (Div. 2) & Codeforces Round #295 (Div. 1) | 6 | |

415 | Arthur and Brackets | Codeforces | Codeforces Round #288 (Div. 2) | 6 | |

416 | Distributing Parts | Codeforces | Codeforces Round #283 (Div. 2) | 6 | |

417 | Restoring Increasing Sequence | Codeforces | Codeforces Round #279 (Div. 2) | 6 | |

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

419 | Kindergarten | Codeforces | Codeforces Round #276 (Div. 1) | 6 | |

420 | Artem and Array | Codeforces | Codeforces Round #253 (Div. 1) | 6 | |

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

422 | Sereja and Table | Codeforces | Codeforces Round #243 (Div. 1) | 6 | |

423 | Cunning Gena | Codeforces | RCC 2014 Warmup (Div. 2) & RCC 2014 Warmup (Div. 1) | 6 | |

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

425 | Mittens | Codeforces | Codeforces Round #217 (Div. 2) | 6 | |

426 | Sereja and the Arrangement of Numbers | Codeforces | Codeforces Round #215 (Div. 1) & Codeforces Round #215 (Div. 2) | 6 | |

427 | Dima and Containers | Codeforces | Codeforces Round #208 (Div. 2) | 6 | |

428 | Compartments | Codeforces | Codeforces Round #207 (Div. 1) & Codeforces Round #207 (Div. 2) | 6 | |

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

430 | Banana | Codeforces | MemSQL start[c]up Round 2 - online version | 6 | |

431 | Main Sequence | Codeforces | Codeforces Round #176 (Div. 1) & Codeforces Round #176 (Div. 2) | 6 | |

432 | Beautiful Decomposition | Codeforces | Codeforces Round #171 (Div. 2) | 6 | |

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

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

435 | Wonderful Randomized Sum | Codeforces | Codeforces Beta Round #33 (Codeforces format) | 6 | |

436 | Trains and Statistic | Codeforces | Codeforces Round #353 (Div. 2) | 6 | |

437 | Trees | Codeforces | Codeforces Beta Round #54 (Div. 2) | 6 | |

438 | Ithea Plays With Chtholly | Codeforces | Codeforces Round #449 (Div. 1) & Codeforces Round #449 (Div. 2) | 6 | |

439 | Divide and conquer | SGU | 6 | ||

440 | World Eater Brothers | Codeforces | Codeforces Round #148 (Div. 1) & Codeforces Round #148 (Div. 2) | 7 | |

441 | Boring Partition | Codeforces | Codeforces Round #148 (Div. 1) & Codeforces Round #148 (Div. 2) | 7 | |

442 | The table | Codeforces | Codeforces Round #140 (Div. 1) | 7 | |

443 | Demonstration | Codeforces | Codeforces Round #121 (Div. 1) & Codeforces Round #121 (Div. 2) | 7 | |

444 | Geometry Horse | Codeforces | Codeforces Round #115 | 7 | |

445 | Zebra Tower | Codeforces | VK Cup 2012 Qualification Round 2 | 7 | |

446 | Digits Permutations | Codeforces | Codeforces Beta Round #99 (Div. 1) & Codeforces Beta Round #99 (Div. 2) | 7 | |

447 | Hobbits' Party | Codeforces | Codeforces Testing Round #2 | 7 | |

448 | Russian Roulette | Codeforces | Codeforces Beta Round #80 (Div. 1 Only) & Codeforces Beta Round #80 (Div. 2 Only) | 7 | |

449 | Lucky Numbers | Codeforces | Codeforces Beta Round #77 (Div. 1 Only) | 7 | |

450 | End of Exams | Codeforces | Codeforces Beta Round #76 (Div. 1 Only) & Codeforces Beta Round #76 (Div. 2 Only) | 7 | |

451 | Beavermuncher-0xFF | Codeforces | Codeforces Beta Round #69 (Div. 1 Only) & Codeforces Beta Round #69 (Div. 2 Only) | 7 | |

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

453 | Restoration of the Permutation | Codeforces | Manthan 2011 | 7 | |

454 | Three Base Stations | Codeforces | Codeforces Beta Round #48 | 7 | |

455 | TCMCF+++ | Codeforces | School Team Contest #3 (Winter Computer School 2010/11) | 7 | |

456 | Event Dates | Codeforces | School Team Contest #3 (Winter Computer School 2010/11) | 7 | |

457 | Old Berland Language | Codeforces | Codeforces Beta Round #37 | 7 | |

458 | Computer Game | Codeforces | Codeforces Beta Round #37 | 7 | |

459 | Seller Bob | Codeforces | Codeforces Beta Round #18 (Div. 2 Only) | 7 | |

460 | Intellectual Inquiry | Codeforces | CROC 2016 - Elimination Round | 7 | |

461 | Bear and Contribution | Codeforces | VK Cup 2016 - Round 1 | 7 | |

462 | Road Improvement | Codeforces | VK Cup 2016 - Qualification Round 2 | 7 | |

463 | Package Delivery | Codeforces | 8VC Venture Cup 2016 - Final Round | 7 | |

464 | New Year and Three Musketeers | Codeforces | Good Bye 2015 | 7 | |

465 | Bulbo | Codeforces | Bubble Cup 8 - Finals [Online Mirror] | 7 | |

466 | Nudist Beach | Codeforces | Codeforces Round #309 (Div. 1) | 7 | |

467 | Quest | Codeforces | VK Cup 2015 - Round 3 (unofficial online mirror, Div. 1 only) | 7 | |

468 | Group Photo 2 (online mirror version) | Codeforces | VK Cup 2015 - Round 1 (unofficial online mirror, Div. 1 only) | 7 | |

469 | Social Network | Codeforces | VK Cup 2015 - Round 1 | 7 | |

470 | Chicken or Fish? | Codeforces | VK Cup 2015 - Qualification Round 1 | 7 | |

471 | Arthur and Questions | Codeforces | Codeforces Round #293 (Div. 2) | 7 | |

472 | Kamal-ol-molk's Painting | Codeforces | Bayan 2015 Contest Warm Up | 7 | |

473 | Distributed Join | Codeforces | MemSQL Start[c]UP 2.0 - Round 2 | 7 | |

474 | Special Grid | Codeforces | Codeforces Round #249 (Div. 2) | 7 | |

475 | Guess the Tree | Codeforces | Codeforces Round #245 (Div. 1) & Codeforces Round #245 (Div. 2) | 7 | |

476 | Population Size | Codeforces | Codeforces Round #241 (Div. 2) | 7 | |

477 | Free Market | Codeforces | Codeforces Round #213 (Div. 1) & Codeforces Round #213 (Div. 2) | 7 | |

478 | Fools and Foolproof Roads | Codeforces | Codeforces Round #212 (Div. 2) | 7 | |

479 | Jeff and Permutation | Codeforces | Codeforces Round #204 (Div. 1) | 7 | |

480 | Students' Revenge | Codeforces | Codeforces Round #193 (Div. 2) | 7 | |

481 | Sheldon and Ice Pieces | Codeforces | Testing Round #8 | 7 | |

482 | Lovely Matrix | Codeforces | Codeforces Round #168 (Div. 1) | 7 | |

483 | Black and White Tree | Codeforces | Codeforces Round #158 (Div. 2) | 7 | |

484 | Number Transformation | Codeforces | Codeforces Round #153 (Div. 1) & Codeforces Round #153 (Div. 2) | 7 | |

485 | Educational Game | Codeforces | ABBYY Cup 2.0 - Hard | 7 | |

486 | Educational Game | Codeforces | ABBYY Cup 2.0 - Hard | 7 | |

487 | Range Increments | Codeforces | VK Cup 2012 Round 3 (Unofficial Div. 2 Edition) | 7 | |

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

489 | Dima and Horses | Codeforces | Codeforces Round #167 (Div. 2) & Codeforces Round #167 (Div. 1) | 7 | |

490 | Hamiltonian Cycle | Live Archive | 1997 | Latin America - South America | 7 |

491 | Ant Man | Codeforces | Codeforces Round #366 (Div. 1) & Codeforces Round #366 (Div. 2) | 7 | |

492 | Change-free | Codeforces | Codeforces Round #398 (Div. 2) | 7 | |

493 | Sweets for Everyone! | Codeforces | Codeforces Round #152 (Div. 2) & Codeforces Round #152 (Div. 1) | 8 | |

494 | T-decomposition | Codeforces | Codeforces Round #147 (Div. 2) | 8 | |

495 | Merging Two Decks | Codeforces | Codeforces Round #145 (Div. 2, ACM-ICPC Rules) & Codeforces Round #145 (Div. 1, ACM-ICPC Rules) | 8 | |

496 | Trails and Glades | Codeforces | VK Cup 2012 Finals, Practice Session | 8 | |

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

498 | Optimal Sum | Codeforces | Codeforces Round #117 (Div. 2) | 8 | |

499 | Name | Codeforces | Codeforces Round #116 (Div. 2, ACM-ICPC Rules) | 8 | |

500 | Competition | Codeforces | Codeforces Round #103 (Div. 2) | 8 | |

501 | Swaps | Codeforces | Codeforces Testing Round #3 | 8 | |

502 | Constants in the language of Shakespeare | Codeforces | Codeforces Beta Round #96 (Div. 1) | 8 | |

503 | E-reader Display | Codeforces | Codeforces Beta Round #93 (Div. 1 Only) & Codeforces Beta Round #93 (Div. 2 Only) | 8 | |

504 | Brackets | Codeforces | Codeforces Beta Round #92 (Div. 1 Only) & Codeforces Beta Round #92 (Div. 2 Only) | 8 | |

505 | Castle | Codeforces | Codeforces Beta Round #79 (Div. 1 Only) | 8 | |

506 | Polycarp's Picture Gallery | Codeforces | Yandex.Algorithm Open 2011 Qualification 1 | 8 | |

507 | FreeDiv | Codeforces | Codeforces Beta Round #66 | 8 | |

508 | Need For Brake | Codeforces | Codeforces Beta Round #66 | 8 | |

509 | Team Arrangement | Codeforces | Codeforces Beta Round #55 (Div. 2) | 8 | |

510 | Calendar | Codeforces | Codeforces Beta Round #54 (Div. 2) | 8 | |

511 | Director | Codeforces | School Team Contest #3 (Winter Computer School 2010/11) | 8 | |

512 | Triminoes | Codeforces | School Team Contest #2 (Winter Computer School 2010/11) | 8 | |

513 | C*++ Calculations | Codeforces | School Team Contest #1 (Winter Computer School 2010/11) | 8 | |

514 | Tricky and Clever Password | Codeforces | Codeforces Beta Round #30 (Codeforces format) | 8 | |

515 | Deletion of Repeats | Codeforces | Codeforces Beta Round #19 | 8 | |

516 | LCS Again | Codeforces | Codeforces Round #320 (Div. 1) [Bayan Thanks-Round] & Codeforces Round #320 (Div. 2) [Bayan Thanks-Round] | 8 | |

517 | CNF 2 | Codeforces | Codeforces Round #317 [AimFund Thanks-Round] (Div. 1) & Codeforces Round #317 [AimFund Thanks-Round] (Div. 2) | 8 | |

518 | New Language | Codeforces | Codeforces Round #315 (Div. 1) & Codeforces Round #315 (Div. 2) | 8 | |

519 | Shop | Codeforces | Codeforces Round #295 (Div. 1) | 8 | |

520 | Alex and Complicated Task | Codeforces | Codeforces Round #267 (Div. 2) | 8 | |

521 | Cardboard Box | Codeforces | Zepto Code Rush 2014 | 8 | |

522 | Square Tiling | Codeforces | Codeforces Round #246 (Div. 2) | 8 | |

523 | Mashmokh and Water Tanks | Codeforces | Codeforces Round #240 (Div. 1) | 8 | |

524 | Maze 1D | Codeforces | Codeforces Round #237 (Div. 2) | 8 | |

525 | Dominoes | Codeforces | Codeforces Round #231 (Div. 2) | 8 | |

526 | Bags and Coins | Codeforces | Codeforces Round #207 (Div. 1) | 8 | |

527 | Antichain | Codeforces | Codeforces Round #205 (Div. 2) | 8 | |

528 | Three Swaps | Codeforces | Codeforces Round #197 (Div. 2) | 8 | |

529 | Ilya and Two Numbers | Codeforces | Codeforces Round #186 (Div. 2) | 8 | |

530 | Memory for Arrays | Codeforces | Croc Champ 2013 - Finals (online version, Div. 1) | 8 | |

531 | Roads in Yusland | Codeforces | Codeforces Round #352 (Div. 1) | 8 | |

532 | Factorial | Codeforces | Unknown Language Round #1 | 8 | |

533 | Road Repairs | Codeforces | Codeforces Round #145 (Div. 1, ACM-ICPC Rules) | 9 | |

534 | Beaver's Calculator 1.0 | Codeforces | Abbyy Cup 2.0 - Final (unofficial) | 9 | |

535 | Beaver's Calculator 1.0 | Codeforces | Abbyy Cup 2.0 - Final (unofficial) | 9 | |

536 | Beaver's Calculator 1.0 | Codeforces | Abbyy Cup 2.0 - Final (unofficial) | 9 | |

537 | Transportation | Codeforces | Codeforces Round #128 (Div. 2) | 9 | |

538 | The Next Good String | Codeforces | Codeforces Round #124 (Div. 1) | 9 | |

539 | Metro Scheme | Codeforces | Codeforces Round #121 (Div. 1) | 9 | |

540 | T-shirt | Codeforces | Croc Champ 2012 - Final | 9 | |

541 | Power Defence | Codeforces | Codeforces Round #115 | 9 | |

542 | Deputies | Codeforces | Croc Champ 2012 - Round 1 | 9 | |

543 | Shoe Store | Codeforces | Codeforces Round #113 (Div. 2) | 9 | |

544 | Two progressions | Codeforces | Codeforces Testing Round #2 | 9 | |

545 | Luck is in Numbers | Codeforces | School Regional Team Contest, Saratov, 2011 | 9 | |

546 | Grocer's Problem | Codeforces | Codeforces Beta Round #75 (Div. 1 Only) | 9 | |

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

548 | Track | Codeforces | Codeforces Beta Round #72 (Div. 1 Only) & Codeforces Beta Round #72 (Div. 2 Only) | 9 | |

549 | Mice | Codeforces | All-Ukrainian School Olympiad in Informatics | 9 | |

550 | Presents | Codeforces | Unknown Language Round #1 | 9 | |

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

552 | Trial for Chief | Codeforces | Codeforces Beta Round #37 | 9 | |

553 | King's Problem? | Codeforces | Codeforces Beta Round #30 (Codeforces format) | 9 | |

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

555 | Raffles | Codeforces | 8VC Venture Cup 2016 - Elimination Round | 9 | |

556 | Birthday | Codeforces | AIM Tech Round (Div. 1) | 9 | |

557 | Walking! | Codeforces | Codeforces Round #320 (Div. 1) [Bayan Thanks-Round] | 9 | |

558 | Replicating Processes | Codeforces | VK Cup 2015 - Finals, online mirror | 9 | |

559 | Berland Local Positioning System | Codeforces | Codeforces Round #298 (Div. 2) | 9 | |

560 | Mr. Kitayuta vs. Bamboos | Codeforces | Codeforces Round #286 (Div. 2) & Codeforces Round #286 (Div. 1) | 9 | |

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

562 | Levko and Game | Codeforces | Codeforces Round #210 (Div. 1) | 9 | |

563 | Pumping Stations | Codeforces | Codeforces Round #200 (Div. 1) | 9 | |

564 | Candies Game | Codeforces | Codeforces Round #198 (Div. 1) | 9 | |

565 | Binary Key | Codeforces | Codeforces Round #193 (Div. 2) | 9 | |

566 | The Red Button | Codeforces | MemSQL start[c]up Round 1 | 9 | |

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

568 | Have You Ever Heard About the Word? | Codeforces | Codeforces Round #189 (Div. 1) | 9 | |

569 | Optimizer | Codeforces | Testing Round #6 | 9 | |

570 | Ever-Hungry Krakozyabra | Codeforces | Codeforces Round #426 (Div. 1) & Codeforces Round #426 (Div. 2) | 9 | |

571 | Huffman Coding on Segment | Codeforces | Codeforces Round #364 (Div. 1) | 9 | |

572 | Heaven Tour | Codeforces | Codeforces Round #119 (Div. 1) | 10 | |

573 | Candy Shop | Codeforces | Croc Champ 2012 - Final | 10 | |

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

575 | Fire and Ice | Codeforces | Codeforces Beta Round #74 (Div. 1 Only) | 10 | |

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

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

578 | Snow sellers | Codeforces | School Personal Contest #3 (Winter Computer School 2010/11) - Codeforces Beta Round #45 (ACM-ICPC Rules) | 10 | |

579 | Forward, march! | Codeforces | Codeforces Beta Round #11 | 10 | |

580 | Dynamic Programming | A2 Online Judge | 10 | ||

581 | To Hack or not to Hack | Codeforces | CROC 2016 - Final Round [Private, For Onsite Finalists Only] | 10 | |

582 | Frog Fights | Codeforces | Codeforces Round #342 (Div. 2) | 10 | |

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

584 | Kojiro and Furrari | Codeforces | Codeforces Round #322 (Div. 2) | 10 | |

585 | Bear and Bowling | Codeforces | Codeforces Round #318 [RussianCodeCup Thanks-Round] (Div. 1) | 10 | |

586 | Summer Dichotomy | Codeforces | Codeforces Round #300 | 10 | |

587 | Berland Miners | Codeforces | VK Cup 2015 - Round 2 (unofficial online mirror, Div. 1 only) | 10 | |

588 | Spiders Evil Plan | Codeforces | ZeptoLab Code Rush 2015 | 10 | |

589 | An easy problem about trees | Codeforces | MemSQL Start[c]UP 2.0 - Round 2 | 10 | |

590 | Stock Trading | Codeforces | Rockethon 2014 | 10 | |

591 | The Tournament | Codeforces | Rockethon 2014 | 10 | |

592 | Summer Reading | Codeforces | Codeforces Round #217 (Div. 2) | 10 | |

593 | Buy One, Get One Free | Codeforces | MemSQL start[c]up Round 2 - online version | 10 | |

594 | Sheep | Codeforces | Croc Champ 2013 - Finals (online version, Div. 1) | 10 | |

595 | Greedy Petya | Codeforces | April Fools Day Contest 2013 | 10 | |

596 | Goats and Wolves | Codeforces | School Team Contest #3 (Winter Computer School 2010/11) | 10 | |

597 | Organizing a Race | Codeforces | Codeforces Round #352 (Div. 1) | 10 | |

598 | Chess Championship | Codeforces | Codeforces Round #382 (Div. 1) | 10 | |

599 | Restore the Tree | Codeforces | Codeforces Round #440 (Div. 1, based on Technocup 2018 Elimination Round 2) | 10 |