1 |
P1 - Little Elephant and Interval |
Codeforces |
Codeforces Round #129 (Div. 1) & Codeforces Round #129 (Div. 2) |

2 |
P2 - Bubble Sort Graph |
Codeforces |
Codeforces Round #198 (Div. 2) & Codeforces Round #198 (Div. 1) |

3 |
P3 - Voltage Keepsake |
Codeforces |
VK Cup 2017 - Round 2 |

4 |
P4 - Guess Your Way Out! |
Codeforces |
Codeforces Round #287 (Div. 2) |

5 |
P5 - Regular Bracket Sequence |
Codeforces |
Codeforces Beta Round #26 (Codeforces format) |

6 |
P6 - Vasya's Calendar |
Codeforces |
Codeforces Round #117 (Div. 2) |

7 |
P7 - Dima and Sequence |
Codeforces |
Codeforces Round #167 (Div. 2) |

8 |
P8 - Matchmaker |
Codeforces |
VK Cup 2012 Qualification Round 2 |

9 |
P9 - Reconnaissance |
Codeforces |
Codeforces Beta Round #32 (Div. 2, Codeforces format) |

10 |
P10 - Quiz |
Codeforces |
Codeforces Round #196 (Div. 2) & Codeforces Round #196 (Div. 1) |

11 |
P11 - Mahmoud and a Message |
Codeforces |
Codeforces Round #396 (Div. 2) |

12 |
P12 - Unfair Poll |
Codeforces |
Codeforces Round #392 (Div. 2) |

13 |
P13 - Walking in the Rain |
Codeforces |
Codeforces Round #121 (Div. 2) |

14 |
P14 - Magical Array |
Codeforces |
Codeforces Beta Round #72 (Div. 1 Only) & Codeforces Beta Round #72 (Div. 2 Only) |

15 |
P15 - Help Kingdom of Far Far Away 2 |
Codeforces |
Codeforces Round #102 (Div. 2) |

16 |
P16 - Sereja and Swaps |
Codeforces |
Codeforces Round #243 (Div. 1) & Codeforces Round #243 (Div. 2) |

17 |
P17 - Little Elephant and Sorting |
Codeforces |
Codeforces Round #129 (Div. 2) |

18 |
P18 - Zuma |
Codeforces |
Codeforces Round #336 (Div. 1) & Codeforces Round #336 (Div. 2) |

19 |
P19 - Mike and Chocolate Thieves |
Codeforces |
Codeforces Round #361 (Div. 2) |

20 |
P20 - News About Credit |
Codeforces |
VK Cup 2017 - Qualification 1 |

21 |
P21 - Success Rate |
Codeforces |
VK Cup 2017 - Round 3 |

22 |
P22 - s-palindrome |
Codeforces |
Educational Codeforces Round 14 |

23 |
P23 - Amr and Chemistry |
Codeforces |
Codeforces Round #312 (Div. 2) |

24 |
P24 - Primes on Interval |
Codeforces |
Codeforces Round #147 (Div. 2) |

25 |
P25 - Cloud of Hashtags |
Codeforces |
Codeforces Round #401 (Div. 2) |

26 |
P26 - One-Dimensional Battle Ships |
Codeforces |
Codeforces Round #Pi (Div. 2) |

27 |
P27 - Tavas and Karafs |
Codeforces |
Codeforces Round #299 (Div. 2) & Codeforces Round #299 (Div. 1) |

28 |
P28 - Andrey and Problem |
Codeforces |
Codeforces Round #253 (Div. 1) & Codeforces Round #253 (Div. 2) |

29 |
P29 - Dasha and Very Difficult Problem |
Codeforces |
Codeforces Round #394 (Div. 2) |

30 |
P30 - Remainders Game |
Codeforces |
Codeforces Round #360 (Div. 1) & Codeforces Round #360 (Div. 2) |

31 |
P31 - Mountain Scenery |
Codeforces |
Codeforces Round #134 (Div. 2) |

32 |
P32 - Special Offer! Super Price 999 Bourles! |
Codeforces |
Codeforces Round #135 (Div. 2) |

33 |
P33 - Little Elephant and Cards |
Codeforces |
Codeforces Round #129 (Div. 1) & Codeforces Round #129 (Div. 2) |

34 |
P34 - Powerful array |
Codeforces |
Yandex.Algorithm 2011 Round 2 |

35 |
P35 - Perfect Pair |
Codeforces |
Codeforces Round #188 (Div. 1) & Codeforces Round #188 (Div. 2) |

36 |
P36 - Okabe and Boxes |
Codeforces |
Codeforces Round #420 (Div. 2) |

37 |
P37 - Mike and Shortcuts |
Codeforces |
Codeforces Round #361 (Div. 2) |

38 |
P38 - New Password |
Codeforces |
VK Cup 2017 - Qualification 2 |

39 |
P39 - Greg and Graph |
Codeforces |
Codeforces Round #179 (Div. 1) & Codeforces Round #179 (Div. 2) |

40 |
P40 - Working out |
Codeforces |
Codeforces Round #245 (Div. 1) & Codeforces Round #245 (Div. 2) |

41 |
P41 - Fix a Tree |
Codeforces |
Codeforces Round #363 (Div. 1) & Codeforces Round #363 (Div. 2) |

42 |
P42 - Code Parsing |
Codeforces |
Codeforces Round #156 (Div. 2) |

43 |
P43 - Win or Freeze |
Codeforces |
Codeforces Round #107 (Div. 1) & Codeforces Round #107 (Div. 2) |

44 |
P44 - Mike and Feet |
Codeforces |
Codeforces Round #305 (Div. 1) & Codeforces Round #305 (Div. 2) |

45 |
P45 - Median Smoothing |
Codeforces |
Codeforces Round #327 (Div. 1) & Codeforces Round #327 (Div. 2) |

46 |
P46 - Help Far Away Kingdom |
Codeforces |
Codeforces Beta Round #78 (Div. 2 Only) |

47 |
P47 - Petya and Java |
Codeforces |
Codeforces Beta Round #61 (Div. 2) |

48 |
P48 - Kostya the Sculptor |
Codeforces |
Codeforces Round #378 (Div. 2) |

49 |
P49 - Hongcow Solves A Puzzle |
Codeforces |
Codeforces Round #385 (Div. 2) |

50 |
P50 - Cosmic Tables |
Codeforces |
Codeforces Round #137 (Div. 2) |

51 |
P51 - T-Shirt Hunt |
Codeforces |
Codeforces Round #412 (rated, Div. 2, base on VK Cup 2017 Round 3) |

52 |
P52 - Recycling Bottles |
Codeforces |
Codeforces Round #352 (Div. 1) & Codeforces Round #352 (Div. 2) |

53 |
P53 - Vasya and Robot |
Codeforces |
Codeforces Round #206 (Div. 1) & Codeforces Round #206 (Div. 2) |

54 |
P54 - Sereja and Brackets |
Codeforces |
Codeforces Round #223 (Div. 1) & Codeforces Round #223 (Div. 2) |

55 |
P55 - Graph and String |
Codeforces |
AIM Tech Round (Div. 1) & AIM Tech Round (Div. 2) |

56 |
P56 - Odd sum |
Codeforces |
Educational Codeforces Round 19 |

57 |
P57 - Molly's Chemicals |
Codeforces |
ICM Technex 2017 and Codeforces Round #400 (Div. 1 + Div. 2, combined) |

58 |
P58 - Distance in Tree |
Codeforces |
VK Cup 2012 Round 1 |

59 |
P59 - Anton and Chess |
Codeforces |
Codeforces Round #379 (Div. 2) |

60 |
P60 - Cards with Numbers |
Codeforces |
Codeforces Round #155 (Div. 2) |

61 |
P61 - Cleaner Robot |
Codeforces |
2015-2016 ACM-ICPC, NEERC, Southern Subregional Contest (Online Mirror, ACM-ICPC Rules, Teams Preferred) |

62 |
P62 - Ping-Pong (Easy Version) |
Codeforces |
Codeforces Round #189 (Div. 2) |

63 |
P63 - Common Divisors |
Codeforces |
Codeforces Round #117 (Div. 2) |

64 |
P64 - Let's Watch Football |
Codeforces |
Codeforces Round #123 (Div. 2) |

65 |
P65 - Dasha and Password |
Codeforces |
Codeforces Round #394 (Div. 2) |

66 |
P66 - Polycarp at the Radio |
Codeforces |
Codeforces Round #375 (Div. 2) |

67 |
P67 - Physics Practical |
Codeforces |
Codeforces Round #154 (Div. 2) |

68 |
P68 - Destroying Array |
Codeforces |
Intel Code Challenge Elimination Round (Div. 1 + Div. 2, combined) |

69 |
P69 - k-Factorization |
Codeforces |
Educational Codeforces Round 19 |

70 |
P70 - Ice Cave |
Codeforces |
Codeforces Round #301 (Div. 2) |

71 |
P71 - Bear and Blocks |
Codeforces |
Codeforces Round #318 [RussianCodeCup Thanks-Round] (Div. 1) & Codeforces Round #318 [RussianCodeCup Thanks-Round] (Div. 2) |

72 |
P72 - Dima and Staircase |
Codeforces |
Codeforces Round #167 (Div. 2) & Codeforces Round #167 (Div. 1) |

73 |
P73 - Cows and Sequence |
Codeforces |
Codeforces Round #174 (Div. 1) & Codeforces Round #174 (Div. 2) |

74 |
P74 - Heap Operations |
Codeforces |
Codeforces Round #357 (Div. 2) |

75 |
P75 - Good Sequences |
Codeforces |
Codeforces Round #162 (Div. 1) & Codeforces Round #162 (Div. 2) |

76 |
P76 - School Marks |
Codeforces |
Codeforces Round #301 (Div. 2) |

77 |
P77 - Password Check |
Codeforces |
Coder-Strike 2014 - Qualification Round |

78 |
P78 - Masha and geometric depression |
Codeforces |
Codeforces Round #407 (Div. 2) |

79 |
P79 - Counting-out Rhyme |
Codeforces |
Educational Codeforces Round 18 |

80 |
P80 - Watering Flowers |
Codeforces |
Codeforces Round #340 (Div. 2) |

81 |
P81 - Cthulhu |
Codeforces |
Codeforces Beta Round #80 (Div. 1 Only) & Codeforces Beta Round #80 (Div. 2 Only) |

82 |
P82 - Dima and To-do List |
Codeforces |
Codeforces Round #214 (Div. 2) |

83 |
P83 - Primes or Palindromes? |
Codeforces |
Codeforces Round #315 (Div. 1) & Codeforces Round #315 (Div. 2) |

84 |
P84 - Day at the Beach |
Codeforces |
Codeforces Round #332 (Div. 2) |

85 |
P85 - Students and Shoelaces |
Codeforces |
Codeforces Beta Round #94 (Div. 2 Only) |

86 |
P86 - Worms Evolution |
Codeforces |
Codeforces Beta Round #31 (Div. 2, Codeforces format) |

87 |
P87 - Robbers' watch |
Codeforces |
Codeforces Round #359 (Div. 1) & Codeforces Round #359 (Div. 2) |

88 |
P88 - Maximum Absurdity |
Codeforces |
Codeforces Round #193 (Div. 2) |

89 |
P89 - Vanya and Scales |
Codeforces |
Codeforces Round #308 (Div. 2) |

90 |
P90 - Unusual Product |
Codeforces |
Codeforces Round #238 (Div. 2) & Codeforces Round #238 (Div. 1) |

91 |
P91 - Batch Sort |
Codeforces |
Intel Code Challenge Final Round (Div. 1 + Div. 2, Combined) |

92 |
P92 - Arpa's loud Owf and Mehrdad's evil plan |
Codeforces |
Codeforces Round #383 (Div. 1) & Codeforces Round #383 (Div. 2) |

93 |
P93 - Lorenzo Von Matterhorn |
Codeforces |
Codeforces Round #362 (Div. 1) & Codeforces Round #362 (Div. 2) |

94 |
P94 - PolandBall and Forest |
Codeforces |
8VC Venture Cup 2017 - Elimination Round |

95 |
P95 - Oleg and shares |
Codeforces |
Tinkoff Challenge - Elimination Round |

96 |
P96 - Powers of Two |
Codeforces |
Educational Codeforces Round 15 |

97 |
P97 - Voting |
Codeforces |
Codeforces Round #388 (Div. 2) |

98 |
P98 - Transformation: from A to B |
Codeforces |
Technocup 2017 - Elimination Round 1 (Unofficially Open for Everyone, Rated for Div. 2) |

99 |
P99 - Text Volume |
Codeforces |
Educational Codeforces Round 26 |

100 |
P100 - Chat Order |
Codeforces |
VK Cup 2016 - Qualification Round 1 |

101 |
P101 - Guest From the Past |
Codeforces |
Codeforces Round #342 (Div. 2) |

102 |
P102 - Vasya and Chess |
Codeforces |
Codeforces Round #281 (Div. 2) |

103 |
P103 - Spotlights |
Codeforces |
Technocup 2017 - Elimination Round 2 |

104 |
P104 - Mafia |
Codeforces |
Codeforces Round #202 (Div. 1) & Codeforces Round #202 (Div. 2) |

105 |
P105 - Coloring Trees |
Codeforces |
Codeforces Round #369 (Div. 2) |

106 |
P106 - Xor-tree |
Codeforces |
Codeforces Round #245 (Div. 1) & Codeforces Round #245 (Div. 2) |

107 |
P107 - Santa Claus and Keyboard Check |
Codeforces |
Technocup 2017 - Elimination Round 3 |

108 |
P108 - Glass Carving |
Codeforces |
Codeforces Round #296 (Div. 2) & Codeforces Round #296 (Div. 1) |

109 |
P109 - Mister B and Angle in Polygon |
Codeforces |
Codeforces Round #421 (Div. 2) |

110 |
P110 - Hongcow Builds A Nation |
Codeforces |
Codeforces Round #385 (Div. 1) & Codeforces Round #385 (Div. 2) |

111 |
P111 - Sagheer and Nubian Market |
Codeforces |
Codeforces Round #417 (Div. 2) |

112 |
P112 - LLPS |
Codeforces |
Codeforces Round #127 (Div. 2) |

113 |
P113 - Funky Numbers |
Codeforces |
Codeforces Round #121 (Div. 2) |

114 |
P114 - A Problem about Polyline |
Codeforces |
Codeforces Round #320 (Div. 1) [Bayan Thanks-Round] & Codeforces Round #320 (Div. 2) [Bayan Thanks-Round] |

115 |
P115 - Petya and Countryside |
Codeforces |
Codeforces Beta Round #61 (Div. 2) |

116 |
P116 - The Meeting Place Cannot Be Changed |
Codeforces |
?????????? 2017 - ????? (?????? ??? ??????-??????????) |

117 |
P117 - Writing Code |
Codeforces |
Codeforces Round #302 (Div. 1) & Codeforces Round #302 (Div. 2) |

118 |
P118 - Magic Powder - 2 |
Codeforces |
Codeforces Round #350 (Div. 2) |

119 |
P119 - Lakes in Berland |
Codeforces |
Codeforces Round #375 (Div. 2) |

120 |
P120 - HDD is Outdated Technology |
Codeforces |
Educational Codeforces Round 4 |

121 |
P121 - Year of University Entrance |
Codeforces |
VK Cup 2017 - Qualification 1 |

122 |
P122 - Hamming Distance Sum |
Codeforces |
Codeforces Round #336 (Div. 2) |

123 |
P123 - Spongebob and Joke |
Codeforces |
Codeforces Round #332 (Div. 2) |

124 |
P124 - Santa Claus and Robot |
Codeforces |
Technocup 2017 - Elimination Round 3 |

125 |
P125 - Anton and Fairy Tale |
Codeforces |
Codeforces Round #404 (Div. 2) |

126 |
P126 - Andryusha and Colored Balloons |
Codeforces |
?????????? 2017 - ????? (?????? ??? ??????-??????????) |

127 |
P127 - Mike and Cellphone |
Codeforces |
Codeforces Round #361 (Div. 2) |

128 |
P128 - Okabe and Banana Trees |
Codeforces |
Codeforces Round #420 (Div. 2) |

129 |
P129 - Borze |
Codeforces |
Codeforces Beta Round #32 (Div. 2, Codeforces format) |

130 |
P130 - Help Vasilisa the Wise 2 |
Codeforces |
Codeforces Round #102 (Div. 2) |

131 |
P131 - Sherlock and his girlfriend |
Codeforces |
ICM Technex 2017 and Codeforces Round #400 (Div. 1 + Div. 2, combined) |

132 |
P132 - Dasha and friends |
Codeforces |
Codeforces Round #394 (Div. 2) |

133 |
P133 - Snacktower |
Codeforces |
Codeforces Round #398 (Div. 2) |

134 |
P134 - Is it rated? |
Codeforces |
Codeforces Round #412 (rated, Div. 2, base on VK Cup 2017 Round 3) |

135 |
P135 - Code obfuscation |
Codeforces |
Codeforces Round #397 by Kaspersky Lab and Barcelona Bootcamp (Div. 1 + Div. 2 combined) |

136 |
P136 - Bash's Big Day |
Codeforces |
Codecraft-17 and Codeforces Round #391 (Div. 1 + Div. 2, combined) |

137 |
P137 - Vladik and fractions |
Codeforces |
Codeforces Round #384 (Div. 2) |

138 |
P138 - New Bus Route |
Codeforces |
Educational Codeforces Round 18 |

139 |
P139 - Restaurant Tables |
Codeforces |
Codeforces Round #423 (Div. 2, rated, based on VK Cup Finals) |

140 |
P140 - PolandBall and Game |
Codeforces |
8VC Venture Cup 2017 - Elimination Round |

141 |
P141 - Table Tennis Game 2 |
Codeforces |
Codeforces Round #397 by Kaspersky Lab and Barcelona Bootcamp (Div. 1 + Div. 2 combined) |

142 |
P142 - Game of Credit Cards |
Codeforces |
Codeforces Round #401 (Div. 2) |

143 |
P143 - Plus and Square Root |
Codeforces |
Codeforces Round #372 (Div. 1) & Codeforces Round #372 (Div. 2) |

144 |
P144 - Barnicle |
Codeforces |
Codeforces Round #362 (Div. 2) |

145 |
P145 - Thor |
Codeforces |
Codeforces Round #366 (Div. 1) & Codeforces Round #366 (Div. 2) |

146 |
P146 - Points on Line |
Codeforces |
Codeforces Round #153 (Div. 1) & Codeforces Round #153 (Div. 2) |

147 |
P147 - Functions again |
Codeforces |
Codeforces Round #407 (Div. 1) & Codeforces Round #407 (Div. 2) |

148 |
P148 - Timofey and a tree |
Codeforces |
Codeforces Round #395 (Div. 1) & Codeforces Round #395 (Div. 2) |

149 |
P149 - Food on the Plane |
Codeforces |
Canada Cup 2016 |

150 |
P150 - Growing Mushrooms |
Codeforces |
Codeforces Round #118 (Div. 2) |