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

1 | Registration System | Codeforces | Codeforces Beta Round #4 (Div. 2 Only) | 1 | |

2 | Street Parade | SPOJ | 1 | ||

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

4 | Can you answer these queries III | SPOJ | 1 | ||

5 | Can you answer these queries II | SPOJ | 1 | ||

6 | Can you answer these queries I | SPOJ | 1 | ||

7 | Maximum Sum | SPOJ | 1 | ||

8 | How to Handle the Fans | SPOJ | 1 | ||

9 | Division of Nlogonia | UVA | 1 | ||

10 | Banknotes and Coins | URI | 1 | ||

11 | Xenia and Bit Operations | Codeforces | Codeforces Round #197 (Div. 2) | 1 | |

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

13 | A and B and Compilation Errors | Codeforces | Codeforces Round #294 (Div. 2) | 1 | |

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

15 | Misha and Changing Handles | Codeforces | Codeforces Round #285 (Div. 2) | 1 | |

16 | Number of Ways | Codeforces | Codeforces Round #266 (Div. 2) | 1 | |

17 | Prison Transfer | Codeforces | Codeforces Round #244 (Div. 2) | 1 | |

18 | Sereja and Suffixes | Codeforces | Codeforces Round #215 (Div. 2) | 1 | |

19 | Little Girl and Maximum Sum | Codeforces | Codeforces Round #169 (Div. 2) | 1 | |

20 | Simple Math | A2 Online Judge | 1 | ||

21 | 4 Values whose Sum is 0 | Live Archive | 2005 | Europe - Southwestern | 1 |

22 | Snacktower | Codeforces | Codeforces Round #398 (Div. 2) | 1 | |

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

24 | Cd and pwd commands | Codeforces | VK Cup 2012 Qualification Round 1 | 2 | |

25 | Binary Search Tree | UVA | 2 | ||

26 | Hardwood Species | TJU | 2 | ||

27 | True Friends | SPOJ | 2 | ||

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

29 | FIGUREFUL | SPOJ | 2 | ||

30 | Chat Order | Codeforces | VK Cup 2016 - Qualification Round 1 | 2 | |

31 | Modulo Sum | Codeforces | Codeforces Round #319 (Div. 2) | 2 | |

32 | Replacement | Codeforces | Codeforces Round #316 (Div. 2) | 2 | |

33 | Geometric Progression | Codeforces | Codeforces Round #Pi (Div. 2) | 2 | |

34 | Photo to Remember | Codeforces | VK Cup 2015 - Qualification Round 1 | 2 | |

35 | Anya and Smartphone | Codeforces | Codeforces Round #293 (Div. 2) | 2 | |

36 | Knight Tournament | Codeforces | Codeforces Round #207 (Div. 1) & Codeforces Round #207 (Div. 2) | 2 | |

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

38 | Greg and Array | Codeforces | Codeforces Round #179 (Div. 1) & Codeforces Round #179 (Div. 2) | 2 | |

39 | Escape from Stones | Codeforces | Codeforces Round #162 (Div. 1) & Codeforces Round #162 (Div. 2) | 2 | |

40 | Sonya and Queries | Codeforces | Codeforces Round #371 (Div. 1) & Codeforces Round #371 (Div. 2) | 2 | |

41 | Thor | Codeforces | Codeforces Round #366 (Div. 1) & Codeforces Round #366 (Div. 2) | 2 | |

42 | The Festive Evening | Codeforces | Codeforces Round #426 (Div. 2) | 2 | |

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

44 | Karen and Coffee | Codeforces | Codeforces Round #419 (Div. 2) | 2 | |

45 | Hoax or what | UVA | 2 | ||

46 | Counting heaps | Live Archive | 2008 | Europe - Central | 2 |

47 | Vasya and Multisets | Codeforces | Educational Codeforces Round 51 (Rated for Div. 2) | 2 | |

48 | Colorful Graph | Codeforces | Codeforces Round #151 (Div. 2) | 3 | |

49 | Little Elephant and Array | Codeforces | Codeforces Round #136 (Div. 1) & Codeforces Round #136 (Div. 2) | 3 | |

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

51 | Plug-in | Codeforces | Yandex.Algorithm Open 2011 Qualification 1 | 3 | |

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

53 | Stripe | Codeforces | Codeforces Beta Round #18 (Div. 2 Only) | 3 | |

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

55 | Level Order Tree Traversal | URI | 3 | ||

56 | Stacks | Timus | 3 | ||

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

58 | Not Equal on a Segment | Codeforces | Educational Codeforces Round 7 | 3 | |

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

60 | Bear and Blocks | Codeforces | Codeforces Round #318 [RussianCodeCup Thanks-Round] (Div. 1) & Codeforces Round #318 [RussianCodeCup Thanks-Round] (Div. 2) | 3 | |

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

62 | Mike and Feet | Codeforces | Codeforces Round #305 (Div. 1) & Codeforces Round #305 (Div. 2) | 3 | |

63 | Glass Carving | Codeforces | Codeforces Round #296 (Div. 2) & Codeforces Round #296 (Div. 1) | 3 | |

64 | A and B and Interesting Substrings | Codeforces | Codeforces Round #294 (Div. 2) | 3 | |

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

66 | Interesting Array | Codeforces | Codeforces Round #275 (Div. 1) & Codeforces Round #275 (Div. 2) | 3 | |

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

68 | Pashmak and Parmida's problem | Codeforces | Codeforces Round #261 (Div. 2) | 3 | |

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

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

71 | Sereja and Brackets | Codeforces | Codeforces Round #223 (Div. 1) & Codeforces Round #223 (Div. 2) | 3 | |

72 | Sereja and Algorithm | Codeforces | Codeforces Round #215 (Div. 1) | 3 | |

73 | Bubble Sort Graph | Codeforces | Codeforces Round #198 (Div. 2) & Codeforces Round #198 (Div. 1) | 3 | |

74 | Maximum Absurdity | Codeforces | Codeforces Round #193 (Div. 2) | 3 | |

75 | Dima and Staircase | Codeforces | Codeforces Round #167 (Div. 2) & Codeforces Round #167 (Div. 1) | 3 | |

76 | Good Substrings | Codeforces | Codeforces Round #166 (Div. 2) | 3 | |

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

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

79 | Blue Mary Needs Help Again | SPOJ | 3 | ||

80 | Okabe and Boxes | Codeforces | Codeforces Round #420 (Div. 2) | 3 | |

81 | Vasiliy's Multiset | Codeforces | Codeforces Round #367 (Div. 2) | 3 | |

82 | Almost Union-Find | UVA | 3 | ||

83 | Almost Arithmetical Progression | Codeforces | Codeforces Round #156 (Div. 2) & Codeforces Round #156 (Div. 1) | 4 | |

84 | XOR on Segment | Codeforces | Codeforces Round #149 (Div. 2) | 4 | |

85 | King's Path | Codeforces | Codeforces Round #149 (Div. 2) | 4 | |

86 | Little Elephant and Cards | Codeforces | Codeforces Round #129 (Div. 1) & Codeforces Round #129 (Div. 2) | 4 | |

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

88 | Fools and Roads | Codeforces | Codeforces Round #121 (Div. 1) & Codeforces Round #121 (Div. 2) | 4 | |

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

90 | String Manipulation 1.0 | Codeforces | VK Cup 2012 Qualification Round 2 | 4 | |

91 | Anagram Search | Codeforces | Codeforces Round #103 (Div. 2) | 4 | |

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

93 | Petya and Divisors | Codeforces | Codeforces Beta Round #85 (Div. 1 Only) & Codeforces Beta Round #85 (Div. 2 Only) | 4 | |

94 | Enemy is weak | Codeforces | Codeforces Beta Round #57 (Div. 2) | 4 | |

95 | Circular RMQ | Codeforces | Codeforces Testing Round #1 | 4 | |

96 | SBE201 Linked List | SPOJ | 4 | ||

97 | Ice-cream Tycoon | SGU | 4 | ||

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

99 | Processing Queries | Codeforces | CROC 2016 - Qualification | 4 | |

100 | Report | Codeforces | Codeforces Round #344 (Div. 2) | 4 | |

101 | Babaei and Birthday Cake | Codeforces | Codeforces Round #343 (Div. 2) | 4 | |

102 | XOR and Favorite Number | Codeforces | Codeforces Round #340 (Div. 2) | 4 | |

103 | Longest k-Good Segment | Codeforces | Educational Codeforces Round 5 | 4 | |

104 | Lazy Student | Codeforces | Codeforces Round #335 (Div. 1) & Codeforces Round #335 (Div. 2) | 4 | |

105 | One-Dimensional Battle Ships | Codeforces | Codeforces Round #Pi (Div. 2) | 4 | |

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

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

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

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

110 | A and B and Lecture Rooms | Codeforces | Codeforces Round #294 (Div. 2) | 4 | |

111 | Ant colony | Codeforces | Codeforces Round #271 (Div. 2) | 4 | |

112 | Propagating tree | Codeforces | Codeforces Round #225 (Div. 1) & Codeforces Round #225 (Div. 2) | 4 | |

113 | Maximum Submatrix 2 | Codeforces | Codeforces Round #221 (Div. 1) & Codeforces Round #221 (Div. 2) | 4 | |

114 | Vessels | Codeforces | Codeforces Round #218 (Div. 2) | 4 | |

115 | Matrix | Codeforces | Codeforces Round #213 (Div. 1) & Codeforces Round #213 (Div. 2) | 4 | |

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

117 | Xenia and Tree | Codeforces | Codeforces Round #199 (Div. 2) | 4 | |

118 | Psychos in a Line | Codeforces | Codeforces Round #189 (Div. 1) & Codeforces Round #189 (Div. 2) | 4 | |

119 | Planets | Codeforces | Codeforces Round #142 (Div. 1) & Codeforces Round #142 (Div. 2) | 4 | |

120 | Queue | Codeforces | Codeforces Beta Round #75 (Div. 1 Only) & Codeforces Beta Round #75 (Div. 2 Only) | 4 | |

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

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

123 | Tree Construction | Codeforces | Codeforces Round #353 (Div. 2) | 4 | |

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

125 | Ada and List | SPOJ | 4 | ||

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

127 | Alyona and a tree | Codeforces | Codeforces Round #381 (Div. 1) & Codeforces Round #381 (Div. 2) | 4 | |

128 | Remove Extra One | Codeforces | Codeforces Round #450 (Div. 2) | 4 | |

129 | Blood Cousins | Codeforces | Codeforces Round #130 (Div. 2) | 5 | |

130 | Suspects | Codeforces | Codeforces Round #110 (Div. 1) & Codeforces Round #110 (Div. 2) | 5 | |

131 | Missile Silos | Codeforces | Codeforces Round #103 (Div. 2) | 5 | |

132 | Petr# | Codeforces | Codeforces Beta Round #86 (Div. 1 Only) & Codeforces Beta Round #86 (Div. 2 Only) | 5 | |

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

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

135 | Exposition | Codeforces | Codeforces Beta Round #6 (Div. 2 Only) | 5 | |

136 | Nested Segments | Codeforces | Educational Codeforces Round 10 | 5 | |

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

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

139 | Spy Syndrome 2 | Codeforces | Manthan, Codefest 16 | 5 | |

140 | Factory Repairs | Codeforces | 8VC Venture Cup 2016 - Final Round | 5 | |

141 | New Year Tree | Codeforces | Educational Codeforces Round 6 | 5 | |

142 | Minimum spanning tree for each edge | Codeforces | Educational Codeforces Round 3 | 5 | |

143 | Lipshitz Sequence | Codeforces | Codeforces Round #333 (Div. 1) & Codeforces Round #333 (Div. 2) | 5 | |

144 | Duff in the Army | Codeforces | Codeforces Round #326 (Div. 1) & Codeforces Round #326 (Div. 2) | 5 | |

145 | A Simple Task | Codeforces | Codeforces Round #312 (Div. 2) | 5 | |

146 | Case of Chocolate | Codeforces | Codeforces Round #310 (Div. 1) & Codeforces Round #310 (Div. 2) | 5 | |

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

148 | Statistics of Recompressing Videos | Codeforces | VK Cup 2015 - Qualification Round 2 | 5 | |

149 | R2D2 and Droid Army | Codeforces | Codeforces Round #291 (Div. 2) | 5 | |

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

151 | Strip | Codeforces | Codeforces Round #278 (Div. 1) & Codeforces Round #278 (Div. 2) | 5 | |

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

153 | Pillars | Codeforces | Codeforces Round #271 (Div. 2) | 5 | |

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

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

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

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

158 | Sereja ans Anagrams | Codeforces | Codeforces Round #215 (Div. 1) & Codeforces Round #215 (Div. 2) | 5 | |

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

160 | Copying Data | Codeforces | Croc Champ 2013 - Round 1 | 5 | |

161 | Connected Components | Codeforces | Croc Champ 2013 - Round 1 | 5 | |

162 | Sausage Maximization | Codeforces | Codeforces Round #173 (Div. 2) | 5 | |

163 | Maximum Xor Secondary | Codeforces | Codeforces Round #172 (Div. 1) & Codeforces Round #172 (Div. 2) | 5 | |

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

165 | Bracket Sequence | Codeforces | Codeforces Round #138 (Div. 1) & Codeforces Round #138 (Div. 2) | 5 | |

166 | Subsegments | Codeforces | Codeforces Beta Round #63 (Div. 2) | 5 | |

167 | Mail Stamps | Codeforces | Codeforces Beta Round #29 (Div. 2, Codeforces format) | 5 | |

168 | Kay and Snowflake | Codeforces | Codeforces Round #359 (Div. 1) & Codeforces Round #359 (Div. 2) | 5 | |

169 | Cards Sorting | Codeforces | Codeforces Round #424 (Div. 1, rated, based on VK Cup Finals) & Codeforces Round #424 (Div. 2, rated, based on VK Cup Finals) | 5 | |

170 | The Bakery | Codeforces | Codeforces Round #426 (Div. 1) & Codeforces Round #426 (Div. 2) | 5 | |

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

172 | Leaving Auction | Codeforces | Codeforces Round #388 (Div. 2) | 5 | |

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

174 | Mahmoud and a Dictionary | Codeforces | Codeforces Round #396 (Div. 2) | 5 | |

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

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

177 | Vitya and Strange Lesson | Codeforces | Codeforces Round #430 (Div. 2) | 5 | |

178 | Mishka and Interesting sum | Codeforces | Codeforces Round #365 (Div. 2) | 5 | |

179 | Friends and Subsequences | Codeforces | Codeforces Round #361 (Div. 2) | 5 | |

180 | Persistent Bookcase | Codeforces | Codeforces Round #368 (Div. 2) | 5 | |

181 | Hydra | Codeforces | Codeforces Round #150 (Div. 1) & Codeforces Round #150 (Div. 2) | 6 | |

182 | Two Strings | Codeforces | Codeforces Round #138 (Div. 1) & Codeforces Round #138 (Div. 2) | 6 | |

183 | Lucky Queries | Codeforces | Codeforces Round #104 (Div. 1) | 6 | |

184 | Time to Raid Cowavans | Codeforces | Codeforces Beta Round #80 (Div. 1 Only) & Codeforces Beta Round #80 (Div. 2 Only) | 6 | |

185 | Buses | Codeforces | Codeforces Beta Round #79 (Div. 1 Only) & Codeforces Beta Round #79 (Div. 2 Only) | 6 | |

186 | Sum of Medians | Codeforces | Yandex.Algorithm 2011 Round 1 | 6 | |

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

188 | Holes | Codeforces | Codeforces Beta Round #13 | 6 | |

189 | Messenger | Codeforces | Codeforces Round #344 (Div. 2) | 6 | |

190 | Subsequences | Codeforces | Testing Round #12 | 6 | |

191 | Hiring | Codeforces | 2015-2016 ACM-ICPC, NEERC, Southern Subregional Contest (Online Mirror, ACM-ICPC Rules, Teams Preferred) | 6 | |

192 | Kefa and Watch | Codeforces | Codeforces Round #321 (Div. 2) | 6 | |

193 | Restructuring Company | Codeforces | VK Cup 2015 - Finals, online mirror | 6 | |

194 | GukiZ and GukiZiana | Codeforces | Codeforces Round #307 (Div. 2) | 6 | |

195 | Infinite Inversions | Codeforces | Codeforces Round #301 (Div. 2) | 6 | |

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

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

198 | Closest Equals | Codeforces | VK Cup 2015 - Qualification Round 1 | 6 | |

199 | Drazil and Park | Codeforces | Codeforces Round #292 (Div. 2) & Codeforces Round #292 (Div. 1) | 6 | |

200 | New Year Domino | Codeforces | Good Bye 2014 | 6 | |

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

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

203 | Appleman and a Sheet of Paper | Codeforces | Codeforces Round #263 (Div. 1) & Codeforces Round #263 (Div. 2) | 6 | |

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

205 | DZY Loves Fibonacci Numbers | Codeforces | Codeforces Round #255 (Div. 1) & Codeforces Round #255 (Div. 2) | 6 | |

206 | DZY Loves Colors | Codeforces | Codeforces Round #254 (Div. 1) & Codeforces Round #254 (Div. 2) | 6 | |

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

208 | On Changing Tree | Codeforces | Codeforces Round #232 (Div. 1) & Codeforces Round #232 (Div. 2) | 6 | |

209 | New Year Tree | Codeforces | Good Bye 2013 | 6 | |

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

211 | Valera and Queries | Codeforces | Codeforces Round #216 (Div. 2) | 6 | |

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

213 | Oh Sweet Beaverette | Codeforces | ABBYY Cup 3.0 - Finals (online version) | 6 | |

214 | Ciel and Gondolas | Codeforces | Codeforces Round #190 (Div. 1) | 6 | |

215 | Summer Homework | Codeforces | ABBYY Cup 3.0 | 6 | |

216 | Sereja and Subsequences | Codeforces | Codeforces Round #187 (Div. 1) & Codeforces Round #187 (Div. 2) | 6 | |

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

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

219 | Vanya and Treasure | Codeforces | Codeforces Round #355 (Div. 2) | 6 | |

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

221 | Shortest Path | A2 Online Judge | 6 | ||

222 | Mister B and PR Shifts | Codeforces | Codeforces Round #421 (Div. 1) & Codeforces Round #421 (Div. 2) | 6 | |

223 | Rooter's Song | Codeforces | Codeforces Round #431 (Div. 1) & Codeforces Round #431 (Div. 2) | 6 | |

224 | Leha and another game about graph | Codeforces | Codeforces Round #429 (Div. 1) & Codeforces Round #429 (Div. 2) | 6 | |

225 | Boredom | Codeforces | Codeforces Round #433 (Div. 1, based on Olympiad of Metropolises) & Codeforces Round #433 (Div. 2, based on Olympiad of Metropolises) | 6 | |

226 | Legacy | Codeforces | Codeforces Round #406 (Div. 1) & Codeforces Round #406 (Div. 2) | 6 | |

227 | Mike and Geometry Problem | Codeforces | Codeforces Round #361 (Div. 2) | 6 | |

228 | Mahmoud and a xor trip | Codeforces | Codeforces Round #396 (Div. 2) | 6 | |

229 | Little Elephant and Tree | Codeforces | Codeforces Round #157 (Div. 1) | 7 | |

230 | Blood Cousins Return | Codeforces | Codeforces Round #151 (Div. 2) | 7 | |

231 | Cactus | Codeforces | Codeforces Round #143 (Div. 2) | 7 | |

232 | Little Elephant and Inversions | Codeforces | Codeforces Round #136 (Div. 1) | 7 | |

233 | Little Elephant and Shifts | Codeforces | Codeforces Round #136 (Div. 1) & Codeforces Round #136 (Div. 2) | 7 | |

234 | Spider's Web | Codeforces | Codeforces Round #133 (Div. 2) | 7 | |

235 | Counter Attack | Codeforces | Codeforces Round #120 (Div. 2) | 7 | |

236 | Encrypting Messages | Codeforces | ABBYY Cup 2.0 - Easy | 7 | |

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

238 | Beard Graph | Codeforces | Codeforces Round #112 (Div. 2) | 7 | |

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

240 | Mushroom Gnomes - 2 | Codeforces | Codeforces Beta Round #99 (Div. 1) & Codeforces Beta Round #99 (Div. 2) | 7 | |

241 | Last Chance | Codeforces | Codeforces Beta Round #98 (Div. 2) | 7 | |

242 | Lucky Array | Codeforces | Codeforces Beta Round #91 (Div. 1 Only) | 7 | |

243 | Ski Base | Codeforces | Codeforces Beta Round #75 (Div. 1 Only) & Codeforces Beta Round #75 (Div. 2 Only) | 7 | |

244 | Embassy Queue | Codeforces | Yandex.Algorithm 2011 Round 1 | 7 | |

245 | General Mobilization | Codeforces | Yandex.Algorithm 2011 Qualification 2 | 7 | |

246 | Optical Experiment | Codeforces | Manthan 2011 | 7 | |

247 | Domino Principle | Codeforces | Codeforces Beta Round #52 (Div. 2) | 7 | |

248 | Corporation Mail | Codeforces | Codeforces Beta Round #52 (Div. 2) | 7 | |

249 | Comb | Codeforces | School Personal Contest #2 (Winter Computer School 2010/11) - Codeforces Beta Round #43 (ACM-ICPC Rules) | 7 | |

250 | Parking Lot | Codeforces | School Personal Contest #2 (Winter Computer School 2010/11) - Codeforces Beta Round #43 (ACM-ICPC Rules) | 7 | |

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

252 | Points | Codeforces | Codeforces Beta Round #19 | 7 | |

253 | Ball | Codeforces | Codeforces Beta Round #12 (Div 2 Only) | 7 | |

254 | Bindian Signalizing | Codeforces | Codeforces Beta Round #5 | 7 | |

255 | Beautiful Subarrays | Codeforces | Educational Codeforces Round 12 | 7 | |

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

257 | Hostname Aliases | Codeforces | CROC 2016 - Qualification | 7 | |

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

259 | Product Sum | Codeforces | Codeforces Round #344 (Div. 2) | 7 | |

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

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

262 | Vika and Segments | Codeforces | Codeforces Round #337 (Div. 2) | 7 | |

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

264 | Happy Tree Party | Codeforces | Codeforces Round #329 (Div. 2) | 7 | |

265 | Guess Your Way Out! II | Codeforces | Codeforces Round #312 (Div. 2) | 7 | |

266 | Ann and Half-Palindrome | Codeforces | Codeforces Round #311 (Div. 2) | 7 | |

267 | Rooks and Rectangles | Codeforces | VK Cup 2015 - Round 1 | 7 | |

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

269 | Treeland Tour | Codeforces | Codeforces Round #279 (Div. 2) | 7 | |

270 | Sign on Fence | Codeforces | Codeforces Round #276 (Div. 1) | 7 | |

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

272 | Sereja and Two Sequences | Codeforces | Codeforces Round #243 (Div. 1) & Codeforces Round #243 (Div. 2) | 7 | |

273 | Bug in Code | Codeforces | Coder-Strike 2014 - Finals (online edition, Div. 2) & Coder-Strike 2014 - Finals (online edition, Div. 1) & Coder-Strike 2014 - Finals (online edition, Div. 2) & Coder-Strike 2014 - Finals (online edition, Div. 1) | 7 | |

274 | Bug in Code | Codeforces | Coder-Strike 2014 - Finals (online edition, Div. 2) & Coder-Strike 2014 - Finals (online edition, Div. 1) & Coder-Strike 2014 - Finals (online edition, Div. 2) & Coder-Strike 2014 - Finals (online edition, Div. 1) | 7 | |

275 | Inna and Binary Logic | Codeforces | Codeforces Round #234 (Div. 2) | 7 | |

276 | George and Cards | Codeforces | Codeforces Round #227 (Div. 2) | 7 | |

277 | Inna and Sequence | Codeforces | Codeforces Round #220 (Div. 2) | 7 | |

278 | Dima and Trap Graph | Codeforces | Codeforces Round #214 (Div. 2) | 7 | |

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

280 | Subset Sums | Codeforces | Codeforces Round #202 (Div. 1) & Codeforces Round #202 (Div. 2) | 7 | |

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

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

283 | Cats Transport | Codeforces | Codeforces Round #185 (Div. 1) & Codeforces Round #185 (Div. 2) | 7 | |

284 | Little Girl and Problem on Trees | Codeforces | Codeforces Round #169 (Div. 2) | 7 | |

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

286 | Petya and File System | Codeforces | Codeforces Beta Round #61 (Div. 2) | 7 | |

287 | Ada and Mulberry | SPOJ | 7 | ||

288 | Beer Machines | SPOJ | 7 | ||

289 | Crayon | SPOJ | 7 | ||

290 | Till I Collapse | Codeforces | Codeforces Round #406 (Div. 1) & Codeforces Round #406 (Div. 2) | 7 | |

291 | Envy | Codeforces | Codeforces Round #446 (Div. 1) & Codeforces Round #446 (Div. 2) | 7 | |

292 | Alyona and towers | Codeforces | Codeforces Round #381 (Div. 1) & Codeforces Round #381 (Div. 2) | 7 | |

293 | Anton and Permutation | Codeforces | Codeforces Round #404 (Div. 2) | 7 | |

294 | Ralph And His Tour in Binary Country | Codeforces | Codeforces Round #447 (Div. 2) | 7 | |

295 | Maximum Questions | Codeforces | Codeforces Round #450 (Div. 2) | 7 | |

296 | The Untended Antiquity | Codeforces | Codeforces Round #439 (Div. 2) | 7 | |

297 | Garlands | Codeforces | Codeforces Round #368 (Div. 2) | 7 | |

298 | Working routine | Codeforces | Codeforces Round #367 (Div. 2) | 7 | |

299 | Lucky Arrays | Codeforces | Codeforces Round #156 (Div. 1) | 8 | |

300 | Printer | Codeforces | Codeforces Round #154 (Div. 2) | 8 | |

301 | TorCoder | Codeforces | Codeforces Round #145 (Div. 1, ACM-ICPC Rules) | 8 | |

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

303 | Parking Lot | Codeforces | Codeforces Round #135 (Div. 2) | 8 | |

304 | Two Permutations | Codeforces | Codeforces Round #131 (Div. 1) | 8 | |

305 | Little Elephant and Strings | Codeforces | Codeforces Round #129 (Div. 1) | 8 | |

306 | Cinema | Codeforces | Codeforces Round #126 (Div. 2) | 8 | |

307 | Building Forest | Codeforces | Codeforces Round #123 (Div. 2) | 8 | |

308 | Thwarting Demonstrations | Codeforces | Codeforces Round #121 (Div. 1) | 8 | |

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

310 | Archaeology | Codeforces | Croc Champ 2012 - Round 2 | 8 | |

311 | e-Government | Codeforces | VK Cup 2012 Round 2 | 8 | |

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

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

314 | Linear Kingdom Races | Codeforces | Codeforces Beta Round #87 (Div. 1 Only) | 8 | |

315 | Igloo Skyscraper | Codeforces | Codeforces Beta Round #75 (Div. 1 Only) | 8 | |

316 | Chip Play | Codeforces | Codeforces Beta Round #74 (Div. 1 Only) & Codeforces Beta Round #74 (Div. 2 Only) | 8 | |

317 | Tourist | Codeforces | All-Ukrainian School Olympiad in Informatics | 8 | |

318 | Professor's task | Codeforces | Codeforces Beta Round #64 | 8 | |

319 | Lucky Tickets | Codeforces | Codeforces Beta Round #64 | 8 | |

320 | Petya and Post | Codeforces | Codeforces Beta Round #61 (Div. 2) | 8 | |

321 | Dancing Lessons | Codeforces | School Team Contest #3 (Winter Computer School 2010/11) | 8 | |

322 | Queue | Codeforces | School Personal Contest #1 (Winter Computer School 2010/11) - Codeforces Beta Round #38 (ACM-ICPC Rules) | 8 | |

323 | Parade | Codeforces | Codeforces Beta Round #35 (Div. 2) | 8 | |

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

325 | Don't fear, DravDe is kind | Codeforces | Codeforces Beta Round #28 (Codeforces format) | 8 | |

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

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

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

329 | Yash And Trees | Codeforces | Manthan, Codefest 16 | 8 | |

330 | Startup Funding | Codeforces | Manthan, Codefest 16 | 8 | |

331 | Zbazi in Zeydabad | Codeforces | Educational Codeforces Round 8 | 8 | |

332 | Robot Arm | Codeforces | Wunder Fund Round 2016 (Div. 1 + Div. 2 combined) | 8 | |

333 | Alphabet Permutations | Codeforces | Codeforces Round #337 (Div. 2) | 8 | |

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

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

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

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

338 | Yura and Developers | Codeforces | Looksery Cup 2015 | 8 | |

339 | Mike and Friends | Codeforces | Codeforces Round #305 (Div. 1) | 8 | |

340 | Place Your Ad Here | Codeforces | VK Cup 2015 - Round 3 (unofficial online mirror, Div. 1 only) | 8 | |

341 | Pudding Monsters | Codeforces | ZeptoLab Code Rush 2015 | 8 | |

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

343 | Tourists | Codeforces | Codeforces Round #278 (Div. 1) | 8 | |

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

345 | Permutation | Codeforces | MemSQL Start[c]UP 2.0 - Round 1 | 8 | |

346 | Three strings | Codeforces | MemSQL Start[c]UP 2.0 - Round 1 | 8 | |

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

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

349 | Biathlon Track | Codeforces | Codeforces Round #242 (Div. 2) | 8 | |

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

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

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

353 | Inna and Candy Boxes | Codeforces | Codeforces Round #229 (Div. 2) | 8 | |

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

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

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

357 | Optimize! | Codeforces | Codeforces Round #196 (Div. 1) | 8 | |

358 | Shave Beaver! | Codeforces | ABBYY Cup 3.0 - Finals (online version) | 8 | |

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

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

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

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

363 | Yaroslav and Points | Codeforces | Codeforces Round #179 (Div. 1) | 8 | |

364 | Close Vertices | Codeforces | Croc Champ 2013 - Round 2 | 8 | |

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

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

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

368 | Ultimate Weirdness of an Array | Codeforces | Codeforces Round #352 (Div. 1) & Codeforces Round #352 (Div. 2) | 8 | |

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

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

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

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

373 | Goodbye Souvenir | Codeforces | Codeforces Round #431 (Div. 1) & Codeforces Round #431 (Div. 2) | 8 | |

374 | Tournament | Codeforces | Codeforces Round #443 (Div. 1) & Codeforces Round #443 (Div. 2) | 8 | |

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

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

377 | Vladik and Entertaining Flags | Codeforces | Codeforces Round #416 (Div. 2) | 8 | |

378 | Inversions After Shuffle | Codeforces | Codeforces Round #388 (Div. 2) | 8 | |

379 | Eyes Closed | Codeforces | Codeforces Round #448 (Div. 2) | 8 | |

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

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

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

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

384 | Zigzag | Codeforces | Codeforces Round #141 (Div. 2) | 9 | |

385 | Noble Knight's Path | Codeforces | Codeforces Round #140 (Div. 1) | 9 | |

386 | Alien DNA | Codeforces | Codeforces Round #134 (Div. 1) | 9 | |

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

388 | Gripping Story | Codeforces | Codeforces Round #125 (Div. 1) | 9 | |

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

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

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

392 | Camping Groups | Codeforces | Croc Champ 2012 - Round 1 | 9 | |

393 | Buses and People | Codeforces | Codeforces Round #111 (Div. 2) | 9 | |

394 | Freezing with Style | Codeforces | Codeforces Round #107 (Div. 1) | 9 | |

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

396 | Hanger | Codeforces | Codeforces Beta Round #68 | 9 | |

397 | Half-decay tree | Codeforces | Codeforces Beta Round #62 | 9 | |

398 | Cannon | Codeforces | Codeforces Beta Round #44 (Div. 2) | 9 | |

399 | Map | Codeforces | Codeforces Beta Round #15 | 9 | |

400 | Clockwork Bomb | Codeforces | Codeforces Round #345 (Div. 1) | 9 | |

401 | Fibonacci-ish II | Codeforces | Manthan, Codefest 16 | 9 | |

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

403 | Xors on Segments | Codeforces | Educational Codeforces Round 6 | 9 | |

404 | Pastoral Oddities | Codeforces | Codeforces Round #334 (Div. 1) | 9 | |

405 | A Museum Robbery | Codeforces | Codeforces Round #333 (Div. 1) | 9 | |

406 | Polycarp's Masterpiece | Codeforces | 2015-2016 ACM-ICPC, NEERC, Southern Subregional Contest (Online Mirror, ACM-ICPC Rules, Teams Preferred) | 9 | |

407 | Duff as a Queen | Codeforces | Codeforces Round #326 (Div. 1) | 9 | |

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

409 | Tavas on the Path | Codeforces | Codeforces Round #299 (Div. 1) | 9 | |

410 | And Yet Another Bracket Sequence | Codeforces | VK Cup 2015 - Round 1 | 9 | |

411 | Constrained Tree | Codeforces | Rockethon 2015 | 9 | |

412 | Parking Lot | Codeforces | Codeforces Round #274 (Div. 1) | 9 | |

413 | Design Tutorial: Increase the Constraints | Codeforces | Codeforces Round #270 | 9 | |

414 | The Classic Problem | Codeforces | Codeforces Round #265 (Div. 1) | 9 | |

415 | Function | Codeforces | Codeforces Round #260 (Div. 1) | 9 | |

416 | Little Pony and Lord Tirek | Codeforces | Codeforces Round #259 (Div. 1) | 9 | |

417 | Chemistry Experiment | Codeforces | Codeforces Round #247 (Div. 2) | 9 | |

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

419 | Maze 2D | Codeforces | Coder-Strike 2014 - Round 2 | 9 | |

420 | k-d-sequence | Codeforces | Codeforces Round #239 (Div. 1) | 9 | |

421 | Sereja and Dividing | Codeforces | Codeforces Round #223 (Div. 1) | 9 | |

422 | Two permutations | Codeforces | Testing Round #7 | 9 | |

423 | Ping-Pong | Codeforces | Codeforces Round #189 (Div. 1) | 9 | |

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

425 | Fetch the Treasure | Codeforces | Codeforces Round #185 (Div. 1) & Codeforces Round #185 (Div. 2) | 9 | |

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

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

428 | Mirror Room | Codeforces | Codeforces Round #168 (Div. 1) | 9 | |

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

430 | Roadside Trees | Codeforces | Codeforces Round #162 (Div. 1) | 9 | |

431 | Rhombus | Codeforces | Codeforces Round #161 (Div. 2) | 9 | |

432 | Dividing Kingdom | Codeforces | Codeforces Round #158 (Div. 2) | 9 | |

433 | Greedy Elevator | Codeforces | Codeforces Round #159 (Div. 2) | 9 | |

434 | Forensic Examination | Codeforces | Codeforces Round #349 (Div. 1) | 9 | |

435 | Bear and Bad Powers of 42 | Codeforces | Codeforces Round #356 (Div. 1) | 9 | |

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

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

438 | Arkady and a Nobody-men | Codeforces | Codeforces Round #434 (Div. 1, based on Technocup 2018 Elimination Round 1) | 9 | |

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

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

441 | Welcome home, Chtholly | Codeforces | Codeforces Round #449 (Div. 1) | 9 | |

442 | Mike and code of a permutation | Codeforces | Codeforces Round #410 (Div. 2) | 9 | |

443 | Matrix | Codeforces | Codeforces Round #150 (Div. 1) | 10 | |

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

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

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

447 | Soap Time! - 2 | Codeforces | Codeforces Round #118 (Div. 1) | 10 | |

448 | Gnomes of Might and Magic | Codeforces | Codeforces Round #115 | 10 | |

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

450 | Tree or not Tree | Codeforces | Codeforces Beta Round #88 | 10 | |

451 | Name the album | Codeforces | Unknown Language Round #3 | 10 | |

452 | Shooting Gallery | Codeforces | School Team Contest #2 (Winter Computer School 2010/11) | 10 | |

453 | Stack | Codeforces | Surprise Language Round #6 | 10 | |

454 | MUH and Lots and Lots of Segments | Codeforces | Codeforces Round #269 (Div. 2) | 10 | |

455 | Bear and Chemistry | Codeforces | VK Cup 2016 - Round 1 | 10 | |

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

457 | Duff is Mad | Codeforces | Codeforces Round #326 (Div. 1) | 10 | |

458 | Painting Edges | Codeforces | Codeforces Round #319 (Div. 1) | 10 | |

459 | Robots protection | Codeforces | Bubble Cup 8 - Finals [Online Mirror] | 10 | |

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

461 | Longest Increasing Subsequence | Codeforces | Codeforces Round #315 (Div. 1) | 10 | |

462 | Listening to Music | Codeforces | Codeforces Round #302 (Div. 1) | 10 | |

463 | Duck Hunt | Codeforces | VK Cup 2015 - Round 3 (unofficial online mirror, Div. 1 only) | 10 | |

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

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

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

467 | ELCA | Codeforces | Codeforces Round #275 (Div. 1) | 10 | |

468 | Dreamoon and Notepad | Codeforces | Codeforces Round #272 (Div. 1) | 10 | |

469 | Meta-universe | Codeforces | Bayan 2015 Contest Warm Up | 10 | |

470 | Banners | Codeforces | Zepto Code Rush 2014 | 10 | |

471 | Tricky Password | Codeforces | RCC 2014 Warmup (Div. 1) | 10 | |

472 | Mashmokh's Designed Problem | Codeforces | Codeforces Round #240 (Div. 1) | 10 | |

473 | Two Rooted Trees | Codeforces | Codeforces Round #236 (Div. 1) | 10 | |

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

475 | Supercollider | Codeforces | Rockethon 2014 | 10 | |

476 | Inna and Babies | Codeforces | Codeforces Round #220 (Div. 2) | 10 | |

477 | Two Circles | Codeforces | Codeforces Round #211 (Div. 2) | 10 | |

478 | Escaping on Beaveractor | Codeforces | ABBYY Cup 3.0 - Finals (online version) | 10 | |

479 | Mystic Carvings | Codeforces | Codeforces Round #180 (Div. 1) | 10 | |

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

481 | Game with Two Trees | Codeforces | Abbyy Cup 2.0 - Final (unofficial) | 10 | |

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

483 | New task | Codeforces | Codeforces Round #407 (Div. 1) | 10 | |

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

485 | ALT | Codeforces | Codeforces Round #406 (Div. 1) | 10 | |

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

487 | Arpa’s abnormal DNA and Mehrdad’s deep interest | Codeforces | Codeforces Round #383 (Div. 1) | 10 | |

488 | Lada Malina | Codeforces | Codeforces Round #433 (Div. 1, based on Olympiad of Metropolises) | 10 | |

489 | Caramel Clouds | Codeforces | Codeforces Round #426 (Div. 1) | 10 |