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

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

2 | Mr. Kitayuta's Colorful Graph | Codeforces | Codeforces Round #286 (Div. 1) & Codeforces Round #286 (Div. 2) & Codeforces Round #286 (Div. 1) & Codeforces Round #286 (Div. 2) | 2 |

3 | The Child and Sequence | Codeforces | Codeforces Round #250 (Div. 1) | 5 |

4 | Tricky Function | Codeforces | Codeforces Round #245 (Div. 1) | 5 |

5 | Antimatter | Codeforces | Codeforces Round #225 (Div. 1) | 5 |

6 | Tree and Queries | Codeforces | Codeforces Round #221 (Div. 1) | 5 |

7 | Water Tree | Codeforces | Codeforces Round #200 (Div. 1) | 5 |

8 | Little Artem and Time Machine | Codeforces | VK Cup 2016 - Round 2 | 5 |

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

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

11 | Serega and Fun | Codeforces | Codeforces Round #260 (Div. 1) | 6 |

12 | Jzzhu and Numbers | Codeforces | Codeforces Round #257 (Div. 1) | 6 |

13 | Characteristics of Rectangles | Codeforces | Codeforces Round #194 (Div. 1) | 6 |

14 | Yaroslav and Divisors | Codeforces | Codeforces Round #182 (Div. 1) | 6 |

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

16 | Road Improvement | Codeforces | Codeforces Round #302 (Div. 1) | 6 |

17 | High Cry | Codeforces | Codeforces Round #441 (Div. 1, by Moscow Team Olympiad) & Codeforces Round #441 (Div. 2, by Moscow Team Olympiad) | 6 |

18 | Zip-line | Codeforces | Codeforces Round #345 (Div. 1) | 7 |

19 | Acyclic Organic Compounds | Codeforces | Codeforces Round #333 (Div. 1) | 7 |

20 | Top Secret Task | Codeforces | Codeforces Round #327 (Div. 1) | 7 |

21 | Mike and Fish | Codeforces | Codeforces Round #305 (Div. 1) | 7 |

22 | Fuzzy Search | Codeforces | Codeforces Round #296 (Div. 1) | 7 |

23 | Traffic Jams in the Land | Codeforces | Codeforces Round #284 (Div. 1) | 7 |

24 | Sereja and Squares | Codeforces | Codeforces Round #243 (Div. 1) | 7 |

25 | Hill Climbing | Codeforces | Codeforces Round #238 (Div. 1) | 7 |

26 | Beautiful Pairs of Numbers | Codeforces | Codeforces Round #236 (Div. 1) | 7 |

27 | Iahub and Xors | Codeforces | Codeforces Round #198 (Div. 1) | 7 |

28 | Game with Powers | Codeforces | Codeforces Round #188 (Div. 1) | 7 |

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

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

31 | Couple Cover | Codeforces | Educational Codeforces Round 14 | 7 |

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

33 | Lizard Era: Beginning | Codeforces | Codeforces Round #325 (Div. 1) & Codeforces Round #325 (Div. 2) | 7 |

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

35 | Anton and School | Codeforces | Codeforces Round #379 (Div. 2) | 7 |

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

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

38 | Bacterial Melee | Codeforces | 8VC Venture Cup 2017 - Final Round | 7 |

39 | Axel and Marston in Bitland | Codeforces | ?????????? 2017 - ????? (?????? ??? ??????-??????????) | 7 |

40 | Power Tree | Codeforces | Codeforces Round #336 (Div. 1) | 8 |

41 | Board Game | Codeforces | Codeforces Round #335 (Div. 1) | 8 |

42 | REQ | Codeforces | Codeforces Round #330 (Div. 1) | 8 |

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

44 | Drazil and Morning Exercise | Codeforces | Codeforces Round #292 (Div. 1) | 8 |

45 | Birthday | Codeforces | Codeforces Round #282 (Div. 1) | 8 |

46 | Parcels | Codeforces | Codeforces Round #274 (Div. 1) | 8 |

47 | World of Darkraft - 2 | Codeforces | Codeforces Round #265 (Div. 1) | 8 |

48 | DZY Loves Strings | Codeforces | Codeforces Round #254 (Div. 1) | 8 |

49 | Adam and Tree | Codeforces | Codeforces Round #253 (Div. 1) | 8 |

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

51 | Instant Messanger | Codeforces | Codeforces Round #233 (Div. 1) | 8 |

52 | Developing Game | Codeforces | Codeforces Round #222 (Div. 1) | 8 |

53 | Choosing Subtree is Fun | Codeforces | Codeforces Round #219 (Div. 1) | 8 |

54 | Sereja and Sets | Codeforces | Codeforces Round #215 (Div. 1) | 8 |

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

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

57 | Jeff and Removing Periods | Codeforces | Codeforces Round #204 (Div. 1) | 8 |

58 | Turtles | Codeforces | Codeforces Round #202 (Div. 1) | 8 |

59 | Robot Control | Codeforces | Codeforces Round #201 (Div. 1) | 8 |

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

61 | Sereja and Straight Lines | Codeforces | Codeforces Round #187 (Div. 1) | 8 |

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

63 | Greg and Caves | Codeforces | Codeforces Round #179 (Div. 1) | 8 |

64 | Polo the Penguin and Trees | Codeforces | Codeforces Round #177 (Div. 1) | 8 |

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

66 | k-Maximum Subsequence Sum | Codeforces | Codeforces Round #172 (Div. 1) | 8 |

67 | Maxim and Increasing Subsequence | Codeforces | Codeforces Round #160 (Div. 1) | 8 |

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

69 | Clues | Codeforces | Codeforces Round #110 (Div. 1) | 8 |

70 | Legen... | Codeforces | Codeforces Round #362 (Div. 1) & Codeforces Round #362 (Div. 2) | 8 |

71 | Dividing Kingdom II | Codeforces | Codeforces Round #360 (Div. 1) | 8 |

72 | Kay and Eternity | Codeforces | Codeforces Round #359 (Div. 1) | 8 |

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

74 | Bear and Bowling 4 | Codeforces | Educational Codeforces Round 11 | 8 |

75 | Paper task | Codeforces | IndiaHacks 2016 - Online Edition (Div. 1 + Div. 2) | 8 |

76 | Magic Matrix | Codeforces | Educational Codeforces Round 9 | 8 |

77 | Double Knapsack | Codeforces | Wunder Fund Round 2016 (Div. 1 + Div. 2 combined) | 8 |

78 | Kingdom and its Cities | Codeforces | Codeforces Round #339 (Div. 1) | 8 |

79 | Frogs and mosquitoes | Codeforces | Educational Codeforces Round 3 | 8 |

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

81 | Flights for Regular Customers | Codeforces | Codeforces Round #319 (Div. 1) | 8 |

82 | Conveyor Belts | Codeforces | Codeforces Round #278 (Div. 1) | 8 |

83 | Cup Trick | Codeforces | Coder-Strike 2014 - Finals (online edition, Div. 1) & Coder-Strike 2014 - Finals (online edition, Div. 2) | 8 |

84 | New Year and Cleaning | Codeforces | Good Bye 2015 | 8 |

85 | Animals and Puzzle | Codeforces | Codeforces Round #371 (Div. 1) | 8 |

86 | Arpa’s letter-marked tree and Mehrdad’s Dokhtar-kosh paths | Codeforces | Codeforces Round #383 (Div. 1) | 8 |

87 | Best Edge Weight | Codeforces | Codeforces Round #423 (Div. 1, rated, based on VK Cup Finals) & Codeforces Round #423 (Div. 2, rated, based on VK Cup Finals) | 8 |

88 | Destiny | Codeforces | Codeforces Round #429 (Div. 1) | 8 |

89 | Michael and Charging Stations | Codeforces | Codeforces Round #433 (Div. 1, based on Olympiad of Metropolises) | 8 |

90 | Wizard's Tour | Codeforces | ?????????? 2018 - ?????????? ????? 1 | 8 |

91 | Power Tower | Codeforces | Codeforces Round #454 (Div. 1, based on Technocup 2018 Elimination Round 4) & Codeforces Round #454 (Div. 2, based on Technocup 2018 Elimination Round 4) | 8 |

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

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

94 | Tavas in Kansas | Codeforces | Codeforces Round #299 (Div. 1) | 9 |

95 | Fox And Travelling | Codeforces | Codeforces Round #290 (Div. 1) | 9 |

96 | Misha and XOR | Codeforces | Codeforces Round #285 (Div. 1) | 9 |

97 | Random Function and Tree | Codeforces | Codeforces Round #275 (Div. 1) | 9 |

98 | Dreamoon and Binary | Codeforces | Codeforces Round #272 (Div. 1) | 9 |

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

100 | Little Pony and Elements of Harmony | Codeforces | Codeforces Round #259 (Div. 1) | 9 |

101 | Nanami's Power Plant | Codeforces | Codeforces Round #248 (Div. 1) | 9 |

102 | Largest Submatrix 3 | Codeforces | Codeforces Round #239 (Div. 1) | 9 |

103 | On Sum of Number of Inversions in Permutations | Codeforces | Codeforces Round #232 (Div. 1) | 9 |

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

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

106 | Levko and Sets | Codeforces | Codeforces Round #210 (Div. 1) | 9 |

107 | Transferring Pyramid | Codeforces | Codeforces Round #206 (Div. 1) | 9 |

108 | The Evil Temple and the Moving Rocks | Codeforces | Codeforces Round #192 (Div. 1) | 9 |

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

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

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

112 | Color the Carpet | Codeforces | Codeforces Round #180 (Div. 1) | 9 |

113 | Tourists | Codeforces | Codeforces Round #176 (Div. 1) | 9 |

114 | Google Code Jam | Codeforces | Codeforces Round #170 (Div. 1) | 9 |

115 | Dima and Figure | Codeforces | Codeforces Round #167 (Div. 1) | 9 |

116 | Maximum Waterfall | Codeforces | Codeforces Round #165 (Div. 1) | 9 |

117 | Colorful Stones | Codeforces | Codeforces Round #162 (Div. 1) | 9 |

118 | Liars and Serge | Codeforces | Codeforces Round #156 (Div. 1) | 9 |

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

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

121 | Graph Game | Codeforces | Codeforces Round #146 (Div. 1) | 9 |

122 | Fence | Codeforces | Codeforces Round #144 (Div. 1) | 9 |

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

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

125 | Stars | Codeforces | Codeforces Round #131 (Div. 1) | 9 |

126 | Little Elephant and Retro Strings | Codeforces | Codeforces Round #129 (Div. 1) | 9 |

127 | Brand New Problem | Codeforces | Codeforces Round #127 (Div. 1) | 9 |

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

129 | Two Segments | Codeforces | Codeforces Round #122 (Div. 1) | 9 |

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

131 | BRT Contract | Codeforces | Codeforces Round #119 (Div. 1) | 9 |

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

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

134 | Mission Impassable | Codeforces | Codeforces Round #107 (Div. 1) | 9 |

135 | Lucky Pair | Codeforces | Codeforces Round #104 (Div. 1) | 9 |

136 | Help Shrek and Donkey 2 | Codeforces | Codeforces Round #102 (Div. 1) | 9 |

137 | World of Darkraft | Codeforces | Codeforces Beta Round #99 (Div. 1) | 9 |

138 | Incorrect Flow | Codeforces | AIM Tech Round 3 (Div. 1) | 9 |

139 | T-Shirts | Codeforces | Educational Codeforces Round 15 | 9 |

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

141 | Limak and Shooting Points | Codeforces | Codeforces Round #363 (Div. 1) & Codeforces Round #363 (Div. 2) | 9 |

142 | Lena and Queries | Codeforces | Educational Codeforces Round 13 | 9 |

143 | Bear and Chase | Codeforces | Codeforces Round #356 (Div. 1) | 9 |

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

145 | Edge coloring of bipartite graph | Codeforces | Educational Codeforces Round 2 | 9 |

146 | Bear and Cavalry | Codeforces | Codeforces Round #318 [RussianCodeCup Thanks-Round] (Div. 1) | 9 |

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

148 | Randomizer | Codeforces | Codeforces Round #313 (Div. 1) | 9 |

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

150 | Sereja and Squares | Codeforces | Codeforces Round #187 (Div. 1) | 9 |

151 | Big Problems for Organizers | Codeforces | RCC 2014 Warmup (Div. 1) | 9 |

152 | Large Refrigerator | Codeforces | VK Cup 2012 Round 2 | 9 |

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

154 | Minimum Diameter | Codeforces | VK Cup 2012 Round 3 | 9 |

155 | Hyper String | Codeforces | Croc Champ 2012 - Round 2 | 9 |

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

157 | Cutting a Fence | Codeforces | VK Cup 2012 Finals (unofficial online-version) | 9 |

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

159 | Reclamation | Codeforces | MemSQL start[c]up Round 1 | 9 |

160 | Rectangles and Square | Codeforces | MemSQL start[c]up Round 2 - online version | 9 |

161 | Andrew and Chemistry | Codeforces | Codeforces Round #373 (Div. 1) | 9 |

162 | Permutations | Codeforces | Codeforces Round #382 (Div. 1) | 9 |

163 | Timofey and a flat tree | Codeforces | Codeforces Round #395 (Div. 1) | 9 |

164 | Parquet Re-laying | Codeforces | Codeforces Round #402 (Div. 1) | 9 |

165 | Varying Kibibits | Codeforces | VK Cup 2017 - Round 2 | 9 |

166 | Perishable Roads | Codeforces | VK Cup 2017 - Round 3 | 9 |

167 | Hitchhiking in the Baltic States | Codeforces | Codeforces Round #415 (Div. 1) | 9 |

168 | Karen and Cards | Codeforces | Codeforces Round #419 (Div. 1) | 9 |

169 | Singer House | Codeforces | Codeforces Round #424 (Div. 1, rated, based on VK Cup Finals) | 9 |

170 | Tournament Construction | Codeforces | Codeforces Round #432 (Div. 1, based on IndiaHacks Final Round 2017) | 9 |

171 | Magic Breeding | Codeforces | Codeforces Round #443 (Div. 1) | 9 |

172 | Weighting a Tree | Codeforces | Codeforces Round #453 (Div. 1) | 9 |

173 | Stranger Trees | Codeforces | Codeforces Round #459 (Div. 1) | 9 |

174 | Chain Reaction | Codeforces | Codeforces Round #349 (Div. 1) & Codeforces Round #349 (Div. 2) | 10 |

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

176 | Tree | Codeforces | Codeforces Round #268 (Div. 1) | 10 |

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

178 | Three Arrays | Codeforces | Codeforces Round #230 (Div. 1) | 10 |

179 | Cubes | Codeforces | Codeforces Round #150 (Div. 1) | 10 |

180 | Tape Programming | Codeforces | Codeforces Round #148 (Div. 1) | 10 |

181 | Spider | Codeforces | Codeforces Round #138 (Div. 1) | 10 |

182 | Cube Snake | Codeforces | Codeforces Round #125 (Div. 1) | 10 |

183 | Wizards and Roads | Codeforces | Codeforces Round #114 (Div. 1) | 10 |

184 | Captain America | Codeforces | Codeforces Round #366 (Div. 1) | 10 |

185 | Bearish Fanpages | Codeforces | VK Cup 2016 - Round 3 | 10 |

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

187 | Simba on the Circle | Codeforces | Educational Codeforces Round 4 | 10 |

188 | Cut Length | Codeforces | Educational Codeforces Round 1 | 10 |

189 | Duff in Mafia | Codeforces | Codeforces Round #326 (Div. 1) & Codeforces Round #326 (Div. 2) | 10 |

190 | Number of Binominal Coefficients | Codeforces | Codeforces Round #323 (Div. 1) | 10 |

191 | Campus | Codeforces | Codeforces Round #317 [AimFund Thanks-Round] (Div. 1) | 10 |

192 | Landmarks | Codeforces | VK Cup 2015 - Round 2 (unofficial online mirror, Div. 1 only) | 10 |

193 | Tennis Rackets | Codeforces | Croc Champ 2013 - Finals (online version, Div. 1) | 10 |

194 | Create a Maze | Codeforces | Codeforces Round #372 (Div. 1) | 10 |

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

196 | Recover a functional graph | Codeforces | Codeforces Round #381 (Div. 1) | 10 |

197 | Hongcow Draws a Circle | Codeforces | Codeforces Round #385 (Div. 1) | 10 |

198 | Bear and Rectangle Strips | Codeforces | VK Cup 2017 - Round 1 | 10 |

199 | Rap God | Codeforces | Codeforces Round #406 (Div. 1) | 10 |

200 | Mister B and Astronomers | Codeforces | Codeforces Round #421 (Div. 1) | 10 |

201 | Red-Black Cobweb | Codeforces | Codeforces Round #426 (Div. 1) | 10 |

202 | Dynamic Shortest Path | Codeforces | AIM Tech Round 4 (Div. 1) | 10 |

203 | Shake It! | Codeforces | Codeforces Round #431 (Div. 1) | 10 |

204 | Hex Dyslexia | Codeforces | MemSQL Start[c]UP 3.0 - Round 2 (onsite finalists) | 10 |

205 | Symmetric Projections | Codeforces | ?????????? 2018 - ?????????? ????? 3 | 10 |

206 | Sloth | Codeforces | Codeforces Round #446 (Div. 1) | 10 |

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

208 | A Creative Cutout | Codeforces | Codeforces Round #462 (Div. 1) | 10 |

209 | World of Tank | Codeforces | Codeforces Round #467 (Div. 1) | 10 |