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

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

2 | Video Cards | Codeforces | Codeforces Round #376 (Div. 2) | 5 |

3 | SUM and REPLACE | Codeforces | Educational Codeforces Round 37 (Rated for Div. 2) | 5 |

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

5 | Fence | Codeforces | Codeforces Round #145 (Div. 2, ACM-ICPC Rules) & Codeforces Round #145 (Div. 1, ACM-ICPC Rules) | 6 |

6 | Special Matrices | Codeforces | Codeforces Round #277.5 (Div. 2) | 6 |

7 | st-Spanning Tree | Codeforces | Codeforces Round #375 (Div. 2) | 6 |

8 | Polycarp and Hay | Codeforces | Codeforces Round #346 (Div. 2) | 6 |

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

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

11 | Group Projects | Codeforces | 8VC Venture Cup 2016 - Elimination Round | 6 |

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

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

14 | Drivers Dissatisfaction | Codeforces | Codeforces Round #378 (Div. 2) | 7 |

15 | Tourist Reform | Codeforces | Codeforces Round #377 (Div. 2) | 7 |

16 | Break Up | Codeforces | Codeforces Round #364 (Div. 1) & Codeforces Round #364 (Div. 2) | 7 |

17 | Restore a Number | Codeforces | Codeforces Round #350 (Div. 2) | 7 |

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

19 | Barrels and boxes | Codeforces | Divide by Zero 2017 and Codeforces Round #399 (Div. 1 + Div. 2, combined) | 7 |

20 | Peterson Polyglot | Codeforces | Codeforces Round #402 (Div. 1) & Codeforces Round #402 (Div. 2) | 7 |

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

22 | Expected diameter of a tree | Codeforces | Codeforces Round #411 (Div. 1) & Codeforces Round #411 (Div. 2) | 7 |

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

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

25 | PolandBall and Gifts | Codeforces | 8VC Venture Cup 2017 - Elimination Round | 7 |

26 | Coprime Subsequences | Codeforces | Educational Codeforces Round 20 | 7 |

27 | MEX Queries | Codeforces | Educational Codeforces Round 23 | 7 |

28 | Random Query | Codeforces | Educational Codeforces Round 28 | 7 |

29 | Letters Removing | Codeforces | Codeforces Round #452 (Div. 2) | 7 |

30 | New Year and Rainbow Roads | Codeforces | Good Bye 2017 | 7 |

31 | Present to Mom | Codeforces | Codeforces Beta Round #95 (Div. 2) | 8 |

32 | Progress Monitoring | Codeforces | Codeforces Round #289 (Div. 2, ACM ICPC Rules) | 8 |

33 | Zublicanes and Mumocrates | Codeforces | Codeforces Round #322 (Div. 2) | 8 |

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

35 | Mausoleum | Codeforces | Codeforces Round #Pi (Div. 2) | 8 |

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

37 | Financiers Game | Codeforces | Technocup 2017 - Elimination Round 2 | 8 |

38 | Music in Car | Codeforces | Codeforces Round #386 (Div. 2) | 8 |

39 | Santa Clauses and a Soccer Championship | Codeforces | Technocup 2017 - Elimination Round 3 | 8 |

40 | Team Rocket Rises Again | Codeforces | Codecraft-17 and Codeforces Round #391 (Div. 1 + Div. 2, combined) | 8 |

41 | Geometrical Progression | Codeforces | Codeforces Round #392 (Div. 2) | 8 |

42 | Souvenirs | Codeforces | Codeforces Round #397 by Kaspersky Lab and Barcelona Bootcamp (Div. 1 + Div. 2 combined) | 8 |

43 | Leha and security system | Codeforces | Tinkoff Challenge - Final Round (Codeforces Round #414, rated, Div. 1 + Div. 2) | 8 |

44 | 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 |

45 | Cities Excursions | Codeforces | Codeforces Round #436 (Div. 2) | 8 |

46 | Restoring the Expression | Codeforces | Codeforces Round #451 (Div. 2) | 8 |

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

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

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

50 | The Chocolate Spree | Codeforces | Manthan, Codefest 16 | 8 |

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

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

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

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

55 | String Set Queries | Codeforces | Educational Codeforces Round 16 | 8 |

56 | Polycarp's problems | Codeforces | Technocup 2017 - Elimination Round 1 (Unofficially Open for Everyone, Rated for Div. 2) | 8 |

57 | Card Game | Codeforces | Educational Codeforces Round 21 | 8 |

58 | Level Generation | Codeforces | Educational Codeforces Round 24 | 8 |

59 | String Compression | Codeforces | Educational Codeforces Round 25 | 8 |

60 | Prefix Sums | Codeforces | Educational Codeforces Round 26 | 8 |

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

62 | Almost Permutation | Codeforces | Educational Codeforces Round 29 | 8 |

63 | Yet Another Minimization Problem | Codeforces | Codeforces Round #438 by Sberbank and Barcelona Bootcamp (Div. 1 + Div. 2 combined) | 8 |

64 | Forbidden Indices | Codeforces | Educational Codeforces Round 30 | 8 |

65 | Anti-Palindromize | Codeforces | Educational Codeforces Round 31 | 8 |

66 | Subtree Minimum Query | Codeforces | Educational Codeforces Round 33 (Rated for Div. 2) | 8 |

67 | Tree Destruction | Codeforces | Educational Codeforces Round 35 (Rated for Div. 2) | 8 |

68 | Divisibility | Codeforces | Codeforces Round #461 (Div. 2) | 8 |

69 | Escape Through Leaf | Codeforces | ICM Technex 2018 and Codeforces Round #463 (Div. 1 + Div. 2, combined) | 8 |

70 | Machine Learning | Codeforces | Codeforces Round #466 (Div. 2) | 8 |

71 | Smart Boy | Codeforces | School Personal Contest #1 (Winter Computer School 2010/11) - Codeforces Beta Round #38 (ACM-ICPC Rules) | 9 |

72 | New Year Snowflake | Codeforces | Codeforces Round #100 | 9 |

73 | Simplified Nonogram | Codeforces | Codeforces Round #298 (Div. 2) | 9 |

74 | Pasha and Pipe | Codeforces | Codeforces Round #293 (Div. 2) | 9 |

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

76 | Igor and Interesting Numbers | Codeforces | Codeforces Round #387 (Div. 2) | 9 |

77 | Dasha and Photos | Codeforces | Codeforces Round #394 (Div. 2) | 9 |

78 | Sherlock's bet to Moriarty | Codeforces | ICM Technex 2017 and Codeforces Round #400 (Div. 1 + Div. 2, combined) | 9 |

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

80 | Roads in the Kingdom | Codeforces | Codeforces Round #427 (Div. 2) | 9 |

81 | Madness | Codeforces | Codeforces Round #422 (Div. 2) | 9 |

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

83 | New Year Shopping | Codeforces | Good Bye 2014 | 9 |

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

85 | Expensive Strings | Codeforces | Educational Codeforces Round 5 | 9 |

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

87 | Bear and Fair Set | Codeforces | Educational Codeforces Round 8 | 9 |

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

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

90 | Cyclic Cipher | Codeforces | Intel Code Challenge Elimination Round (Div. 1 + Div. 2, combined) | 9 |

91 | Family Photos | Codeforces | Canada Cup 2016 | 9 |

92 | New Year and Finding Roots | Codeforces | Good Bye 2016 | 9 |

93 | Mice and Holes | Codeforces | Educational Codeforces Round 19 | 9 |

94 | Bipartite Checking | Codeforces | Educational Codeforces Round 22 | 9 |

95 | Paths | Codeforces | Technocup 2018 - Elimination Round 2 | 9 |

96 | Connecting Vertices | Codeforces | Educational Codeforces Round 32 | 9 |

97 | Clear The Matrix | Codeforces | Educational Codeforces Round 34 (Rated for Div. 2) | 9 |

98 | AND-permutations | Codeforces | Codeforces Round #455 (Div. 2) | 9 |

99 | Strongly Connected Tournament | Codeforces | Hello 2018 | 9 |

100 | Substrings in a String | Codeforces | Codecraft-18 and Codeforces Round #458 (Div. 1 + Div. 2, combined) | 9 |

101 | Erasing Substrings | Codeforces | Educational Codeforces Round 38 (Rated for Div. 2) | 9 |

102 | Cutlet | Codeforces | Codeforces Round #464 (Div. 2) | 9 |

103 | Fafa and Array | Codeforces | Codeforces Round #465 (Div. 2) | 9 |

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

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

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

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

108 | Sequence Recovery | Codeforces | Codeforces Round #408 (Div. 2) | 10 |

109 | Beautiful fountains rows | Codeforces | Playrix Codescapes Cup (Codeforces Round #413, rated, Div. 1 + Div. 2) | 10 |

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

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

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

113 | Tree nesting | Codeforces | Educational Codeforces Round 17 | 10 |

114 | Mages and Monsters | Codeforces | Educational Codeforces Round 18 | 10 |

115 | Guards In The Storehouse | Codeforces | Educational Codeforces Round 27 | 10 |

116 | Mahmoud and Ehab and the final stage | Codeforces | Codeforces Round #435 (Div. 2) | 10 |

117 | Nagini | Codeforces | Manthan, Codefest 17 | 10 |

118 | Row of Models | Codeforces | Codeforces Round #444 (Div. 2) | 10 |

119 | A Game With Numbers | Codeforces | Codeforces Round #460 (Div. 2) | 10 |