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Best Problem Setters problems
Problem Name Online Judge Contest Difficulty Level
1 Modular Exponentiation Categories Codeforces Hello 2018 1
2 New Year and Days Categories Codeforces Good Bye 2015 1
3 New Year and North Pole Categories Codeforces Good Bye 2016 1
4 Colorful Stones (Simplified Edition) Categories Codeforces Codeforces Round #162 (Div. 2) 1
5 Hongcow Learns the Cyclic Shift Categories Codeforces Codeforces Round #385 (Div. 2) 1
6 Fraction Categories Codeforces Codeforces Round #433 (Div. 2, based on Olympiad of Metropolises) 1
7 Bear and Finding Criminals Categories Codeforces Codeforces Round #356 (Div. 2) 1
8 Kyoya and Photobooks Categories Codeforces Codeforces Round #309 (Div. 2) 1
9 Minimum Difficulty Categories Codeforces Codeforces Round #283 (Div. 2) 1
10 Petr and Book Categories Codeforces Codeforces Beta Round #99 (Div. 2) 1
11 Bear and Big Brother Categories Codeforces Codeforces Round #405 (rated, Div. 2, based on VK Cup 2017 Round 1) 1
12 Design Tutorial: Learn from Math Categories Codeforces Codeforces Round #270 1
13 New Year and Hurry Categories Codeforces Good Bye 2016 1
14 Olympiad Categories Codeforces Codeforces Round #467 (Div. 2) 1
15 Quasi Binary Categories Codeforces Codeforces Round #300 1
16 Raising Bacteria Categories Codeforces Codeforces Round #320 (Div. 2) [Bayan Thanks-Round] 1
17 Bear and Five Cards Categories Codeforces Codeforces Round #356 (Div. 2) 1
18 Appleman and Toastman Categories Codeforces Codeforces Round #263 (Div. 1) & Codeforces Round #263 (Div. 2) 1
19 Free Ice Cream Categories Codeforces Codeforces Round #359 (Div. 2) 1
20 Bear and Elections Categories Codeforces Codeforces Round #318 [RussianCodeCup Thanks-Round] (Div. 2) 1
21 Two Buttons Categories Codeforces Codeforces Round #295 (Div. 2) 1
22 Appleman and Easy Task Categories Codeforces Codeforces Round #263 (Div. 2) 1
23 Dreamoon and WiFi Categories Codeforces Codeforces Round #272 (Div. 2) 1
24 Bear and Poker Categories Codeforces Codeforces Round #318 [RussianCodeCup Thanks-Round] (Div. 1) & Codeforces Round #318 [RussianCodeCup Thanks-Round] (Div. 2) 1
25 New Year and Counting Cards Categories Codeforces Good Bye 2017 1
26 Andryusha and Socks Categories Codeforces ?????????? 2017 - ????? (?????? ??? ??????-??????????) 1
27 Launch of Collider Categories Codeforces Codeforces Round #363 (Div. 2) 1
28 Pangram Categories Codeforces Codeforces Round #295 (Div. 2) 1
29 Fox And Snake Categories Codeforces Codeforces Round #290 (Div. 2) 1
30 Dreamoon and Stairs Categories Codeforces Codeforces Round #272 (Div. 2) 1
31 Christmas Spruce Categories Codeforces Hello 2018 1
32 Drazil and Date Categories Codeforces Codeforces Round #292 (Div. 2) 1
33 I_love_\%username\% Categories Codeforces Codeforces Round #109 (Div. 2) 1
34 Fox and Number Game Categories Codeforces Codeforces Round #228 (Div. 2) 1
35 Trip For Meal Categories Codeforces Codeforces Round #441 (Div. 2, by Moscow Team Olympiad) 1
36 Roadside Trees (Simplified Edition) Categories Codeforces Codeforces Round #162 (Div. 2) 1
37 Drazil and Factorial Categories Codeforces Codeforces Round #292 (Div. 2) & Codeforces Round #292 (Div. 1) 1
38 Classroom Watch Categories Codeforces Codeforces Round #441 (Div. 1, by Moscow Team Olympiad) & Codeforces Round #441 (Div. 2, by Moscow Team Olympiad) 1
39 Vacations Categories Codeforces Codeforces Round #363 (Div. 1) & Codeforces Round #363 (Div. 2) 1
40 Cells Not Under Attack Categories Codeforces Codeforces Round #364 (Div. 2) 1
41 Code obfuscation Categories Codeforces Codeforces Round #397 by Kaspersky Lab and Barcelona Bootcamp (Div. 1 + Div. 2 combined) 2
42 Planning Categories Codeforces Codeforces Round #433 (Div. 1, based on Olympiad of Metropolises) & Codeforces Round #433 (Div. 2, based on Olympiad of Metropolises) 2
43 Arpa and a research in Mexican wave Categories Codeforces Codeforces Round #432 (Div. 2, based on IndiaHacks Final Round 2017) 2
44 Mr. Kitayuta's Colorful Graph Categories Codeforces Codeforces Round #286 (Div. 1) & Codeforces Round #286 (Div. 2) & Codeforces Round #286 (Div. 1) & Codeforces Round #286 (Div. 2) 2
45 Design Tutorial: Learn from Life Categories Codeforces Codeforces Round #270 2
46 Santa Claus and a Place in a Class Categories Codeforces Technocup 2017 - Elimination Round 3 2
47 Ciel and Flowers Categories Codeforces Codeforces Round #190 (Div. 2) 2
48 Tourist's Notes Categories Codeforces Codeforces Round #300 2
49 New Year and Curling Categories Codeforces Good Bye 2017 2
50 Andryusha and Colored Balloons Categories Codeforces ?????????? 2017 - ????? (?????? ??? ??????-??????????) 2
51 Collecting Beats is Fun Categories Codeforces Codeforces Round #219 (Div. 2) 2
52 Little Robber Girl's Zoo Categories Codeforces Codeforces Round #359 (Div. 2) 2
53 Neverending competitions Categories Codeforces Codeforces Round #397 by Kaspersky Lab and Barcelona Bootcamp (Div. 1 + Div. 2 combined) 2
54 Jumping Ball Categories Codeforces Canada Cup 2016 2
55 Counting Kangaroos is Fun Categories Codeforces Codeforces Round #219 (Div. 1) & Codeforces Round #219 (Div. 2) 2
56 Bear and Three Musketeers Categories Codeforces Codeforces Round #318 [RussianCodeCup Thanks-Round] (Div. 2) 2
57 Drazil and His Happy Friends Categories Codeforces Codeforces Round #292 (Div. 1) & Codeforces Round #292 (Div. 2) & Codeforces Round #292 (Div. 1) & Codeforces Round #292 (Div. 2) 2
58 Removing Columns Categories Codeforces Codeforces Round #283 (Div. 2) & Codeforces Round #283 (Div. 1) 2
59 Appleman and Card Game Categories Codeforces Codeforces Round #263 (Div. 2) 2
60 Kyoya and Colored Balls Categories Codeforces Codeforces Round #309 (Div. 1) & Codeforces Round #309 (Div. 2) 2
61 Vile Grasshoppers Categories Codeforces Codeforces Round #467 (Div. 2) 2
62 Ciel and Dancing Categories Codeforces Codeforces Round #190 (Div. 2) 2
63 Bear and Different Names Categories Codeforces VK Cup 2017 - Round 1 2
64 New Year and Buggy Bot Categories Codeforces Good Bye 2017 2
65 Valued Keys Categories Codeforces Codeforces Round #409 (rated, Div. 2, based on VK Cup 2017 Round 2) 2
66 Bear and Forgotten Tree 3 Categories Codeforces VK Cup 2016 - Round 1 2
67 One Bomb Categories Codeforces Codeforces Round #363 (Div. 2) 2
68 Bear and Prime 100 Categories Codeforces Codeforces Round #356 (Div. 1) & Codeforces Round #356 (Div. 2) 2
69 Fox And Two Dots Categories Codeforces Codeforces Round #290 (Div. 2) 2
70 Guess the Permutation Categories Codeforces Wunder Fund Round 2016 (Div. 1 + Div. 2 combined) 2
71 Cutting Banner Categories Codeforces Codeforces Round #300 2
72 Bear and Friendship Condition Categories Codeforces VK Cup 2017 - Round 1 2
73 Is it rated? Categories Codeforces Codeforces Round #412 (rated, Div. 2, base on VK Cup 2017 Round 3) 2
74 Vicious Keyboard Categories Codeforces Codeforces Round #409 (rated, Div. 2, based on VK Cup 2017 Round 2) 2
75 New Year and Domino Categories Codeforces Good Bye 2015 2
76 Mr. Kitayuta's Colorful Graph Categories Codeforces Codeforces Round #286 (Div. 1) & Codeforces Round #286 (Div. 2) & Codeforces Round #286 (Div. 1) & Codeforces Round #286 (Div. 2) 2
77 Combination Categories Codeforces Codeforces Round #109 (Div. 2) 2
78 Fox and Cross Categories Codeforces Codeforces Round #228 (Div. 2) 2
79 Bear and Displayed Friends Categories Codeforces VK Cup 2016 - Round 1 2
80 Divisiblity of Differences Categories Codeforces Codeforces Round #441 (Div. 2, by Moscow Team Olympiad) 2
81 Escape from Stones Categories Codeforces Codeforces Round #162 (Div. 1) & Codeforces Round #162 (Div. 2) 2
82 Gena's Code Categories Codeforces Codeforces Round #339 (Div. 2) 2
83 Fox and Box Accumulation Categories Codeforces Codeforces Round #228 (Div. 1) & Codeforces Round #228 (Div. 2) 2
84 Slime Combining Categories Codeforces Wunder Fund Round 2016 (Div. 1 + Div. 2 combined) 2
85 They Are Everywhere Categories Codeforces Codeforces Round #364 (Div. 2) 2
86 Table Tennis Game 2 Categories Codeforces Codeforces Round #397 by Kaspersky Lab and Barcelona Bootcamp (Div. 1 + Div. 2 combined) 2
87 New Year and Old Property Categories Codeforces Good Bye 2015 2
88 Fox And Names Categories Codeforces Codeforces Round #290 (Div. 2) & Codeforces Round #290 (Div. 1) 2
89 Bear and Three Balls Categories Codeforces IndiaHacks 2016 - Online Edition (Div. 1 + Div. 2) 2
90 Design Tutorial: Make It Nondeterministic Categories Codeforces Codeforces Round #270 2
91 Petr and a calendar Categories Codeforces Codeforces Round #393 (Div. 2) (8VC Venture Cup 2017 - Final Round Div. 2 Edition) 2
92 Mr. Kitayuta's Gift Categories Codeforces Codeforces Round #286 (Div. 1) & Codeforces Round #286 (Div. 2) & Codeforces Round #286 (Div. 1) & Codeforces Round #286 (Div. 2) 2
93 New Year and Rating Categories Codeforces Good Bye 2016 2
94 Bark to Unlock Categories Codeforces Codeforces Round #438 by Sberbank and Barcelona Bootcamp (Div. 1 + Div. 2 combined) 2
95 Maxim Buys an Apartment Categories Codeforces Codeforces Round #433 (Div. 2, based on Olympiad of Metropolises) 2
96 Link/Cut Tree Categories Codeforces Codeforces Round #339 (Div. 2) 2
97 Bear and Game Categories Codeforces Codeforces Round #351 (VK Cup 2016 Round 3, Div. 2 Edition) 2
98 Ohana Cleans Up Categories Codeforces Codeforces Round #309 (Div. 2) 2
99 Robbers' watch Categories Codeforces Codeforces Round #359 (Div. 1) & Codeforces Round #359 (Div. 2) 3
100 Seating On Bus Categories Codeforces Educational Codeforces Round 11 3
101 Petya and Catacombs Categories Codeforces ?????????? 2018 - ?????????? ????? 3 3
102 LLPS Categories Codeforces Codeforces Round #127 (Div. 2) 3
103 New Skateboard Categories Codeforces Educational Codeforces Round 8 3
104 Finding Team Member Categories Codeforces Codeforces Round #320 (Div. 2) [Bayan Thanks-Round] 3
105 Hongcow Builds A Nation Categories Codeforces Codeforces Round #385 (Div. 1) & Codeforces Round #385 (Div. 2) 3
106 Co-prime Array Categories Codeforces Educational Codeforces Round 11 3
107 Tennis Tournament Categories Codeforces Educational Codeforces Round 8 3
108 Bear and Reverse Radewoosh Categories Codeforces VK Cup 2016 - Round 1 (Div. 2 Edition) 3
109 z-sort Categories Codeforces Educational Codeforces Round 10 3
110 Constellation Categories Codeforces Wunder Fund Round 2016 (Div. 1 + Div. 2 combined) 3
111 T-Shirt Hunt Categories Codeforces Codeforces Round #412 (rated, Div. 2, base on VK Cup 2017 Round 3) 3
112 Bear and Blocks Categories Codeforces Codeforces Round #318 [RussianCodeCup Thanks-Round] (Div. 1) & Codeforces Round #318 [RussianCodeCup Thanks-Round] (Div. 2) 3
113 Bear and Colors Categories Codeforces VK Cup 2016 - Round 3 3
114 The Meeting Place Cannot Be Changed Categories Codeforces ?????????? 2017 - ????? (?????? ??? ??????-??????????) 3
115 Save Energy! Categories Codeforces Codeforces Round #467 (Div. 1) & Codeforces Round #467 (Div. 2) 3
116 "Or" Game Categories Codeforces Codeforces Round #320 (Div. 1) [Bayan Thanks-Round] & Codeforces Round #320 (Div. 2) [Bayan Thanks-Round] 3
117 Good Sequences Categories Codeforces Codeforces Round #162 (Div. 1) & Codeforces Round #162 (Div. 2) 3
118 Party Lemonade Categories Codeforces Hello 2018 3
119 Bear and Compressing Categories Codeforces IndiaHacks 2016 - Online Edition (Div. 1 + Div. 2) 3
120 Dreamoon and Sums Categories Codeforces Codeforces Round #272 (Div. 2) & Codeforces Round #272 (Div. 1) 3
121 Food on the Plane Categories Codeforces Canada Cup 2016 3
122 Frodo and pillows Categories Codeforces Codeforces Round #393 (Div. 2) (8VC Venture Cup 2017 - Final Round Div. 2 Edition) 3
123 Santa Claus and Robot Categories Codeforces Technocup 2017 - Elimination Round 3 3
124 A Problem about Polyline Categories Codeforces Codeforces Round #320 (Div. 1) [Bayan Thanks-Round] & Codeforces Round #320 (Div. 2) [Bayan Thanks-Round] 3
125 Voltage Keepsake Categories Codeforces VK Cup 2017 - Round 2 3
126 Mr. Kitayuta, the Treasure Hunter Categories Codeforces Codeforces Round #286 (Div. 2) & Codeforces Round #286 (Div. 1) 3
127 No to Palindromes! Categories Codeforces Codeforces Round #265 (Div. 1) & Codeforces Round #265 (Div. 2) 3
128 Sorting the Coins Categories Codeforces Codeforces Round #441 (Div. 1, by Moscow Team Olympiad) & Codeforces Round #441 (Div. 2, by Moscow Team Olympiad) 3
129 Fix a Tree Categories Codeforces Codeforces Round #363 (Div. 1) & Codeforces Round #363 (Div. 2) 3
130 DNA Alignment Categories Codeforces Codeforces Round #295 (Div. 2) & Codeforces Round #295 (Div. 1) 3
131 Hard Process Categories Codeforces Educational Codeforces Round 11 3
132 Arpa and an exam about geometry Categories Codeforces Codeforces Round #432 (Div. 2, based on IndiaHacks Final Round 2017) 3
133 Bear and String Distance Categories Codeforces Educational Codeforces Round 8 3
134 Santa Claus and Keyboard Check Categories Codeforces Technocup 2017 - Elimination Round 3 3
135 Success Rate Categories Codeforces VK Cup 2017 - Round 3 3
136 Hongcow Solves A Puzzle Categories Codeforces Codeforces Round #385 (Div. 2) 3
137 Secret Combination Categories Codeforces Codeforces Round #283 (Div. 2) 3
138 Alice, Bob, Two Teams Categories Codeforces Educational Codeforces Round 9 4
139 Tennis Game Categories Codeforces Codeforces Round #283 (Div. 2) & Codeforces Round #283 (Div. 1) 4
140 Bear and Two Paths Categories Codeforces VK Cup 2016 - Round 3 4
141 Travel Card Categories Codeforces 8VC Venture Cup 2017 - Final Round 4
142 Colliders Categories Codeforces Codeforces Round #109 (Div. 1) & Codeforces Round #109 (Div. 2) 4
143 Grandma Laura and Apples Categories Codeforces Educational Codeforces Round 9 4
144 Weakness and Poorness Categories Codeforces Codeforces Round #320 (Div. 1) [Bayan Thanks-Round] & Codeforces Round #320 (Div. 2) [Bayan Thanks-Round] 4
145 Connecting Universities Categories Codeforces Codeforces Round #364 (Div. 1) & Codeforces Round #364 (Div. 2) 4
146 Five Dimensional Points Categories Codeforces Codeforces Round #432 (Div. 1, based on IndiaHacks Final Round 2017) & Codeforces Round #432 (Div. 2, based on IndiaHacks Final Round 2017) 4
147 Too Easy Problems Categories Codeforces Hello 2018 4
148 Appleman and Tree Categories Codeforces Codeforces Round #263 (Div. 1) & Codeforces Round #263 (Div. 2) 4
149 Ciel and Robot Categories Codeforces Codeforces Round #190 (Div. 1) & Codeforces Round #190 (Div. 2) 4
150 Dreamoon and Sets Categories Codeforces Codeforces Round #272 (Div. 2) & Codeforces Round #272 (Div. 1) 4
151 Hidden Word Categories Codeforces Canada Cup 2016 4
152 Pavel and barbecue Categories Codeforces 8VC Venture Cup 2017 - Final Round 4
153 Hometask Categories Codeforces Codeforces Round #109 (Div. 1) & Codeforces Round #109 (Div. 2) 4
154 Qualification Rounds Categories Codeforces Codeforces Round #438 by Sberbank and Barcelona Bootcamp (Div. 1 + Div. 2 combined) 4
155 Volatile Kite Categories Codeforces VK Cup 2017 - Round 2 4
156 Peter and Snow Blower Categories Codeforces Codeforces Round #339 (Div. 1) & Codeforces Round #339 (Div. 2) 4
157 Gabriel and Caterpillar Categories Codeforces Educational Codeforces Round 10 4
158 As Fast As Possible Categories Codeforces Codeforces Round #364 (Div. 1) & Codeforces Round #364 (Div. 2) 4
159 Fox And Jumping Categories Codeforces Codeforces Round #290 (Div. 2) & Codeforces Round #290 (Div. 1) 4
160 Design Tutorial: Inverse the Problem Categories Codeforces Codeforces Round #270 4
161 New Year and Fireworks Categories Codeforces Good Bye 2016 4
162 Race Against Time Categories Codeforces Codeforces Round #438 by Sberbank and Barcelona Bootcamp (Div. 1 + Div. 2 combined) 4
163 Problems for Round Categories Codeforces Codeforces Round #351 (VK Cup 2016 Round 3, Div. 2 Edition) 4
164 Drazil and Tiles Categories Codeforces Codeforces Round #292 (Div. 2) & Codeforces Round #292 (Div. 1) 4
165 The Smallest String Concatenation Categories Codeforces Educational Codeforces Round 9 4
166 Weird Chess Categories Codeforces Codeforces Round #300 4
167 Bus Game Categories Codeforces Codeforces Beta Round #71 4
168 Innokenty and a Football League Categories Codeforces ?????????? 2017 - ????? (?????? ??? ??????-??????????) 4
169 Ciel the Commander Categories Codeforces Codeforces Round #190 (Div. 1) & Codeforces Round #190 (Div. 2) 4
170 Counting Rectangles is Fun Categories Codeforces Codeforces Round #219 (Div. 1) & Codeforces Round #219 (Div. 2) 5
171 Kyoya and Permutation Categories Codeforces Codeforces Round #309 (Div. 1) & Codeforces Round #309 (Div. 2) 5
172 Foe Pairs Categories Codeforces Educational Codeforces Round 10 5
173 Bear and Tree Jumps Categories Codeforces VK Cup 2017 - Round 1 5
174 Ciel and Duel Categories Codeforces Codeforces Round #190 (Div. 1) & Codeforces Round #190 (Div. 2) 5
175 Contest Balloons Categories Codeforces Canada Cup 2016 5
176 Correcting Mistakes Categories Codeforces VK Cup 2015 - Round 2 (unofficial online mirror, Div. 1 only) 5
177 Sleepy Game Categories Codeforces Codeforces Round #467 (Div. 1) & Codeforces Round #467 (Div. 2) 5
178 Skills Categories Codeforces Codeforces Round #339 (Div. 1) & Codeforces Round #339 (Div. 2) 5
179 Bear and Tower of Cubes Categories Codeforces Codeforces Round #356 (Div. 1) & Codeforces Round #356 (Div. 2) 5
180 Literature Lesson Categories Codeforces Codeforces Beta Round #99 (Div. 1) & Codeforces Beta Round #99 (Div. 2) 5
181 Clear Symmetry Categories Codeforces Codeforces Round #127 (Div. 1) & Codeforces Round #127 (Div. 2) 5
182 New Year and Ancient Prophecy Categories Codeforces Good Bye 2015 5
183 Fox and Card Game Categories Codeforces Codeforces Round #228 (Div. 1) & Codeforces Round #228 (Div. 2) 5
184 Restore Cube Categories Codeforces Codeforces Round #265 (Div. 1) 5
185 Fox and Minimal path Categories Codeforces Codeforces Round #228 (Div. 1) & Codeforces Round #228 (Div. 2) 5
186 Choosing Balls Categories Codeforces Codeforces Round #162 (Div. 1) & Codeforces Round #162 (Div. 2) 5
187 Artsem and Saunders Categories Codeforces Codeforces Round #397 by Kaspersky Lab and Barcelona Bootcamp (Div. 1 + Div. 2 combined) 5
188 Number of Parallelograms Categories Codeforces Educational Codeforces Round 11 5
189 Colorful Field Categories Codeforces Codeforces Beta Round #71 5
190 Underground Lab Categories Codeforces ?????????? 2017 - ????? (?????? ??? ??????-??????????) 5
191 Kay and Snowflake Categories Codeforces Codeforces Round #359 (Div. 1) & Codeforces Round #359 (Div. 2) 5
192 Board Game Categories Codeforces VK Cup 2015 - Round 2 (unofficial online mirror, Div. 1 only) 5
193 Jury Meeting Categories Codeforces Codeforces Round #433 (Div. 1, based on Olympiad of Metropolises) & Codeforces Round #433 (Div. 2, based on Olympiad of Metropolises) 5
194 Nested Segments Categories Codeforces Educational Codeforces Round 10 5
195 Making Sequences is Fun Categories Codeforces Codeforces Round #219 (Div. 2) 5
196 Hongcow's Game Categories Codeforces Codeforces Round #385 (Div. 1) & Codeforces Round #385 (Div. 2) 6
197 Wallpaper Categories Codeforces Codeforces Beta Round #99 (Div. 2) 6
198 Hamiltonian Spanning Tree Categories Codeforces Wunder Fund Round 2016 (Div. 1 + Div. 2 combined) 6
199 Arpa and a list of numbers Categories Codeforces Codeforces Round #432 (Div. 1, based on IndiaHacks Final Round 2017) & Codeforces Round #432 (Div. 2, based on IndiaHacks Final Round 2017) 6
200 Appleman and a Sheet of Paper Categories Codeforces Codeforces Round #263 (Div. 1) & Codeforces Round #263 (Div. 2) 6
201 Guess That Car! Categories Codeforces Codeforces Round #127 (Div. 1) & Codeforces Round #127 (Div. 2) 6
202 Delivery Bears Categories Codeforces IndiaHacks 2016 - Online Edition (Div. 1 + Div. 2) 6
203 Bear and Polynomials Categories Codeforces VK Cup 2016 - Round 1 6
204 Magic Numbers Categories Codeforces Educational Codeforces Round 8 6
205 High Cry Categories Codeforces Codeforces Round #441 (Div. 1, by Moscow Team Olympiad) & Codeforces Round #441 (Div. 2, by Moscow Team Olympiad) 6
206 Tree Folding Categories Codeforces Codeforces Round #397 by Kaspersky Lab and Barcelona Bootcamp (Div. 1 + Div. 2 combined) 6
207 Pluses everywhere Categories Codeforces Codeforces Round #295 (Div. 2) & Codeforces Round #295 (Div. 1) 6
208 Fox And Dinner Categories Codeforces Codeforces Round #290 (Div. 2) & Codeforces Round #290 (Div. 1) 6
209 Dreamoon and Strings Categories Codeforces Codeforces Round #272 (Div. 2) & Codeforces Round #272 (Div. 1) 6
210 Bear and Up-Down Categories Codeforces IndiaHacks 2016 - Online Edition (Div. 1 + Div. 2) 6
211 Santa Claus and Tangerines Categories Codeforces Technocup 2017 - Elimination Round 3 6
212 Beaver Categories Codeforces Codeforces Beta Round #71 6
213 A Heap of Heaps Categories Codeforces Codeforces Round #300 6
214 Drazil and Park Categories Codeforces Codeforces Round #292 (Div. 2) & Codeforces Round #292 (Div. 1) 6
215 Substitutes in Number Categories Codeforces Codeforces Round #265 (Div. 1) & Codeforces Round #265 (Div. 2) 6
216 Mr. Kitayuta's Technology Categories Codeforces Codeforces Round #286 (Div. 2) & Codeforces Round #286 (Div. 1) 6
217 National Property Categories Codeforces Codeforces Round #441 (Div. 1, by Moscow Team Olympiad) & Codeforces Round #441 (Div. 2, by Moscow Team Olympiad) 6
218 Ciel and Gondolas Categories Codeforces Codeforces Round #190 (Div. 1) 6
219 Longest Subsequence Categories Codeforces Educational Codeforces Round 9 6
220 Cubes Categories Codeforces Codeforces Round #295 (Div. 2) & Codeforces Round #295 (Div. 1) 6
221 Boredom Categories Codeforces Codeforces Round #433 (Div. 1, based on Olympiad of Metropolises) & Codeforces Round #433 (Div. 2, based on Olympiad of Metropolises) 6
222 Santa Claus and a Palindrome Categories Codeforces Technocup 2017 - Elimination Round 3 6
223 Work Group Categories Codeforces VK Cup 2015 - Round 2 (unofficial online mirror, Div. 1 only) 6
224 Dynamic Problem Scoring Categories Codeforces VK Cup 2017 - Round 3 6
225 Demiurges Play Again Categories Codeforces Codeforces Round #300 6
226 Watching Fireworks is Fun Categories Codeforces Codeforces Round #219 (Div. 1) & Codeforces Round #219 (Div. 2) 6
227 Love Triangles Categories Codeforces Codeforces Round #309 (Div. 1) & Codeforces Round #309 (Div. 2) 6
228 Distributing Parts Categories Codeforces Codeforces Round #283 (Div. 2) 6
229 Restoration of string Categories Codeforces ?????????? 2018 - ?????????? ????? 3 6
230 New Year and Arbitrary Arrangement Categories Codeforces Good Bye 2017 6
231 Double Profiles Categories Codeforces Codeforces Round #109 (Div. 1) & Codeforces Round #109 (Div. 2) 6
232 Encoding Categories Codeforces VK Cup 2015 - Round 2 (unofficial online mirror, Div. 1 only) 7
233 Bear and Contribution Categories Codeforces VK Cup 2016 - Round 1 7
234 Lock Puzzle Categories Codeforces Codeforces Round #467 (Div. 1) & Codeforces Round #467 (Div. 2) 7
235 Necklace Categories Codeforces Codeforces Round #339 (Div. 1) & Codeforces Round #339 (Div. 2) 7
236 Bear and Square Grid Categories Codeforces Codeforces Round #356 (Div. 1) & Codeforces Round #356 (Div. 2) 7
237 Digits Permutations Categories Codeforces Codeforces Beta Round #99 (Div. 1) & Codeforces Beta Round #99 (Div. 2) 7
238 Break Up Categories Codeforces Codeforces Round #364 (Div. 1) & Codeforces Round #364 (Div. 2) 7
239 Bear and Drawing Categories Codeforces Codeforces Round #318 [RussianCodeCup Thanks-Round] (Div. 1) & Codeforces Round #318 [RussianCodeCup Thanks-Round] (Div. 2) 7
240 New Year and Three Musketeers Categories Codeforces Good Bye 2015 7
241 Huge Strings Categories Codeforces Codeforces Round #438 by Sberbank and Barcelona Bootcamp (Div. 1 + Div. 2 combined) 7
242 Vulnerable Kerbals Categories Codeforces VK Cup 2017 - Round 2 7
243 Thief in a Shop Categories Codeforces Educational Codeforces Round 9 7
244 New Year and Old Subsequence Categories Codeforces Good Bye 2016 7
245 Prairie Partition Categories Codeforces VK Cup 2017 - Round 3 7
246 New Year and Rainbow Roads Categories Codeforces Good Bye 2017 7
247 Axel and Marston in Bitland Categories Codeforces ?????????? 2017 - ????? (?????? ??? ??????-??????????) 7
248 Brand New Easy Problem Categories Codeforces Codeforces Round #127 (Div. 2) 7
249 LRU Categories Codeforces Codeforces Round #363 (Div. 1) & Codeforces Round #363 (Div. 2) 7
250 Nudist Beach Categories Codeforces Codeforces Round #309 (Div. 1) 7
251 Pursuit For Artifacts Categories Codeforces Educational Codeforces Round 10 7
252 Set Theory Categories Codeforces Russian Code Cup 2017 - Finals [Unofficial Mirror, Div. 1 Only Recommended, Teams Allowed] 7
253 Bacterial Melee Categories Codeforces 8VC Venture Cup 2017 - Final Round 7
254 Hongcow Buys a Deck of Cards Categories Codeforces Codeforces Round #385 (Div. 1) & Codeforces Round #385 (Div. 2) 7
255 Mushroom Gnomes - 2 Categories Codeforces Codeforces Beta Round #99 (Div. 1) & Codeforces Beta Round #99 (Div. 2) 7
256 Levels and Regions Categories Codeforces VK Cup 2016 - Round 3 7
257 Arpa and a game with Mojtaba Categories Codeforces Codeforces Round #432 (Div. 1, based on IndiaHacks Final Round 2017) & Codeforces Round #432 (Div. 2, based on IndiaHacks Final Round 2017) 7
258 Bear and Company Categories Codeforces VK Cup 2017 - Round 1 7
259 Fragile Bridges Categories Codeforces Codeforces Round #127 (Div. 1) & Codeforces Round #127 (Div. 2) 7
260 Bear and Forgotten Tree 2 Categories Codeforces IndiaHacks 2016 - Online Edition (Div. 1 + Div. 2) 7
261 Nikita and stack Categories Codeforces 8VC Venture Cup 2017 - Final Round 7
262 LCS Again Categories Codeforces Codeforces Round #320 (Div. 1) [Bayan Thanks-Round] & Codeforces Round #320 (Div. 2) [Bayan Thanks-Round] 8
263 Drazil and Morning Exercise Categories Codeforces Codeforces Round #292 (Div. 1) 8
264 Zbazi in Zeydabad Categories Codeforces Educational Codeforces Round 8 8
265 Royal Questions Categories Codeforces Codeforces Round #441 (Div. 1, by Moscow Team Olympiad) 8
266 Souvenirs Categories Codeforces Codeforces Round #397 by Kaspersky Lab and Barcelona Bootcamp (Div. 1 + Div. 2 combined) 8
267 Logical Expression Categories Codeforces Hello 2018 8
268 Binary Blocks Categories Codeforces IndiaHacks 2nd Elimination 2017 (unofficial, unrated mirror, ICPC rules) 8
269 Shop Categories Codeforces Codeforces Round #295 (Div. 1) 8
270 Bear and Bowling 4 Categories Codeforces Educational Codeforces Round 11 8
271 Santa Clauses and a Soccer Championship Categories Codeforces Technocup 2017 - Elimination Round 3 8
272 Password Categories Codeforces Codeforces Beta Round #71 8
273 World of Darkraft - 2 Categories Codeforces Codeforces Round #265 (Div. 1) 8
274 Kay and Eternity Categories Codeforces Codeforces Round #359 (Div. 1) 8
275 Different Subsets For All Tuples Categories Codeforces Educational Codeforces Round 11 8
276 New Year and Original Order Categories Codeforces Good Bye 2017 8
277 Michael and Charging Stations Categories Codeforces Codeforces Round #433 (Div. 1, based on Olympiad of Metropolises) 8
278 Choosing Subtree is Fun Categories Codeforces Codeforces Round #219 (Div. 1) 8
279 Maximum Element Categories Codeforces ?????????? 2018 - ?????????? ????? 3 8
280 Double Knapsack Categories Codeforces Wunder Fund Round 2016 (Div. 1 + Div. 2 combined) 8
281 New Year and Entity Enumeration Categories Codeforces Good Bye 2017 8
282 Paper task Categories Codeforces IndiaHacks 2016 - Online Edition (Div. 1 + Div. 2) 8
283 Magic Matrix Categories Codeforces Educational Codeforces Round 9 8
284 Delivery Club Categories Codeforces Codeforces Round #441 (Div. 1, by Moscow Team Olympiad) 8
285 Yet Another Minimization Problem Categories Codeforces Codeforces Round #438 by Sberbank and Barcelona Bootcamp (Div. 1 + Div. 2 combined) 8
286 Kingdom and its Cities Categories Codeforces Codeforces Round #339 (Div. 1) 8
287 Robot Arm Categories Codeforces Wunder Fund Round 2016 (Div. 1 + Div. 2 combined) 8
288 New Year and Cleaning Categories Codeforces Good Bye 2015 8
289 Too Much Money Categories Codeforces Canada Cup 2016 8
290 Policeman and a Tree Categories Codeforces Codeforces Round #438 by Sberbank and Barcelona Bootcamp (Div. 1 + Div. 2 combined) 9
291 Masha and Cactus Categories Codeforces Russian Code Cup 2017 - Finals [Unofficial Mirror, Div. 1 Only Recommended, Teams Allowed] 9
292 Varying Kibibits Categories Codeforces VK Cup 2017 - Round 2 9
293 The Classic Problem Categories Codeforces Codeforces Round #265 (Div. 1) 9
294 Travelling Through the Snow Queen's Kingdom Categories Codeforces Codeforces Round #359 (Div. 1) 9
295 Roadside Trees Categories Codeforces Codeforces Round #162 (Div. 1) 9
296 Fox And Travelling Categories Codeforces Codeforces Round #290 (Div. 1) 9
297 Dreamoon and Binary Categories Codeforces Codeforces Round #272 (Div. 1) 9
298 Military Trainings Categories Codeforces Abbyy Cup 2.0 - Final (unofficial) 9
299 Design Tutorial: Change the Goal Categories Codeforces Codeforces Round #270 9
300 New Year and Finding Roots Categories Codeforces Good Bye 2016 9
301 Perishable Roads Categories Codeforces VK Cup 2017 - Round 3 9
302 Eleventh Birthday Categories Codeforces Russian Code Cup 2017 - Finals [Unofficial Mirror, Div. 1 Only Recommended, Teams Allowed] 9
303 Andryusha and Nervous Barriers Categories Codeforces ?????????? 2017 - ????? (?????? ??? ??????-??????????) 9
304 Fox and Perfect Sets Categories Codeforces Codeforces Round #228 (Div. 1) 9
305 Thoroughly Bureaucratic Organization Categories Codeforces Codeforces Round #127 (Div. 1) 9
306 Mr. Kitayuta vs. Bamboos Categories Codeforces Codeforces Round #286 (Div. 2) & Codeforces Round #286 (Div. 1) 9
307 Limak and Shooting Points Categories Codeforces Codeforces Round #363 (Div. 1) & Codeforces Round #363 (Div. 2) 9
308 Colorful Stones Categories Codeforces Codeforces Round #162 (Div. 1) 9
309 Beaver's Calculator 1.0 Categories Codeforces Abbyy Cup 2.0 - Final (unofficial) 9
310 Bear and Destroying Subtrees Categories Codeforces VK Cup 2016 - Round 3 9
311 Convex Countour Categories Codeforces IndiaHacks 2nd Elimination 2017 (unofficial, unrated mirror, ICPC rules) 9
312 Similar Words Categories Codeforces Russian Code Cup 2017 - Finals [Unofficial Mirror, Div. 1 Only Recommended, Teams Allowed] 9
313 Move by Prime Categories Codeforces IndiaHacks 2016 - Online Edition (Div. 1 + Div. 2) 9
314 Optimal Point Categories Codeforces Codeforces Round #359 (Div. 1) & Codeforces Round #359 (Div. 2) 9
315 Bear and Bad Powers of 42 Categories Codeforces Codeforces Round #356 (Div. 1) 9
316 Beaver's Calculator 1.0 Categories Codeforces Abbyy Cup 2.0 - Final (unofficial) 9
317 Huffman Coding on Segment Categories Codeforces Codeforces Round #364 (Div. 1) 9
318 World of Darkraft Categories Codeforces Codeforces Beta Round #99 (Div. 1) 9
319 Tournament Construction Categories Codeforces Codeforces Round #432 (Div. 1, based on IndiaHacks Final Round 2017) 9
320 Brand New Problem Categories Codeforces Codeforces Round #127 (Div. 1) 9
321 Ciel and Flipboard Categories Codeforces Codeforces Round #190 (Div. 1) 9
322 Family Photos Categories Codeforces Canada Cup 2016 9
323 Flatland Fencing Categories Codeforces Codeforces Round #109 (Div. 1) 9
324 Bear and Paradox Categories Codeforces VK Cup 2016 - Round 1 9
325 Walking! Categories Codeforces Codeforces Round #320 (Div. 1) [Bayan Thanks-Round] 9
326 The Beaver's Problem - 2 Categories Codeforces ABBYY Cup 2.0 - Hard 9
327 Beaver's Calculator 1.0 Categories Codeforces Abbyy Cup 2.0 - Final (unofficial) 9
328 Bear and Chase Categories Codeforces Codeforces Round #356 (Div. 1) 9
329 Cool Slogans Categories Codeforces Codeforces Round #364 (Div. 1) 9
330 Bear and Fair Set Categories Codeforces Educational Codeforces Round 8 9
331 Strongly Connected Tournament Categories Codeforces Hello 2018 9
332 Bear and Cavalry Categories Codeforces Codeforces Round #318 [RussianCodeCup Thanks-Round] (Div. 1) 9
333 Diverging Directions Categories Codeforces IndiaHacks 2nd Elimination 2017 (unofficial, unrated mirror, ICPC rules) 9
334 Cycling City Categories Codeforces Codeforces Round #295 (Div. 1) 9
335 Appleman and Complicated Task Categories Codeforces Codeforces Round #263 (Div. 1) 9
336 Fox And Polygon Categories Codeforces Codeforces Round #290 (Div. 1) 9
337 Design Tutorial: Increase the Constraints Categories Codeforces Codeforces Round #270 9
338 New Year and Binary Tree Paths Categories Codeforces Good Bye 2016 10
339 Blog Post Rating Categories Codeforces VK Cup 2017 - Round 3 10
340 Security System Categories Codeforces Codeforces Beta Round #71 10
341 Choosing Ads Categories Codeforces VK Cup 2016 - Round 3 10
342 Summer Dichotomy Categories Codeforces Codeforces Round #300 10
343 Intranet of Buses Categories Codeforces ?????????? 2017 - ????? (?????? ??? ??????-??????????) 10
344 The Beaver's Problem - 3 Categories Codeforces Abbyy Cup 2.0 - Final (unofficial) 10
345 Fox and Meteor Shower Categories Codeforces Codeforces Round #228 (Div. 1) 10
346 Dynamic Shortest Path Categories Codeforces AIM Tech Round 4 (Div. 1) 10
347 The Beaver's Problem - 3 Categories Codeforces Abbyy Cup 2.0 - Final (unofficial) 10
348 Cron Categories Codeforces Codeforces Round #363 (Div. 1) 10
349 Mod Mod Mod Categories Codeforces Codeforces Round #445 (Div. 1, based on Technocup 2018 Elimination Round 3) 10
350 The Beaver's Problem - 3 Categories Codeforces Abbyy Cup 2.0 - Final (unofficial) 10
351 New Year and Boolean Bridges Categories Codeforces Good Bye 2017 10
352 Bears and Juice Categories Codeforces VK Cup 2016 - Round 3 10
353 Expected Earnings Categories Codeforces IndiaHacks 2nd Elimination 2017 (unofficial, unrated mirror, ICPC rules) 10
354 Berserk Robot Categories Codeforces Codeforces Round #300 10
355 Game with Two Trees Categories Codeforces Abbyy Cup 2.0 - Final (unofficial) 10
356 Long number Categories Codeforces 8VC Venture Cup 2017 - Final Round 10
357 The Beaver's Problem - 3 Categories Codeforces Abbyy Cup 2.0 - Final (unofficial) 10
358 Hongcow Masters the Cyclic Shift Categories Codeforces Codeforces Round #385 (Div. 1) 10
359 Lada Malina Categories Codeforces Codeforces Round #433 (Div. 1, based on Olympiad of Metropolises) 10
360 Drawing Circles is Fun Categories Codeforces Codeforces Round #219 (Div. 1) 10
361 Design Tutorial: Learn from a Game Categories Codeforces Codeforces Round #270 10
362 Kyoya and Train Categories Codeforces Codeforces Round #309 (Div. 1) 10
363 The Beaver's Problem - 3 Categories Codeforces Abbyy Cup 2.0 - Final (unofficial) 10
364 Subsequences Return Categories Codeforces Codeforces Round #283 (Div. 1) 10
365 Symmetric Projections Categories Codeforces ?????????? 2018 - ?????????? ????? 3 10
366 Combining Slimes Categories Codeforces Wunder Fund Round 2016 (Div. 1 + Div. 2 combined) 10
367 Landmarks Categories Codeforces VK Cup 2015 - Round 2 (unofficial online mirror, Div. 1 only) 10
368 Hellish Constraints Categories Codeforces Codeforces Beta Round #99 (Div. 1) 10
369 Rainbow Balls Categories Codeforces Codeforces Round #432 (Div. 1, based on IndiaHacks Final Round 2017) 10
370 Ants on a Circle Categories Codeforces Educational Codeforces Round 10 10
371 Don't Exceed Categories Codeforces Hello 2018 10
372 Bear and Isomorphic Points Categories Codeforces VK Cup 2017 - Round 1 10
373 Random Elections Categories Codeforces Codeforces Round #432 (Div. 1, based on IndiaHacks Final Round 2017) 10
374 Game with Two Trees Categories Codeforces Abbyy Cup 2.0 - Final (unofficial) 10
375 New Year and Forgotten Tree Categories Codeforces Good Bye 2015 10
376 Martian Colony Categories Codeforces Codeforces Round #109 (Div. 1) 10
377 The Beaver's Problem - 3 Categories Codeforces Abbyy Cup 2.0 - Final (unofficial) 10
378 Game with Two Trees Categories Codeforces Abbyy Cup 2.0 - Final (unofficial) 10
379 Messages on a Tree Categories Codeforces Canada Cup 2016 10
380 Byteland coins Categories Codeforces 8VC Venture Cup 2017 - Final Round 10
381 Iqea Categories Codeforces Codeforces Round #467 (Div. 1) 10
382 El Toll Caves Categories Codeforces Codeforces Round #438 by Sberbank and Barcelona Bootcamp (Div. 1 + Div. 2 combined) 10
383 Hongcow Draws a Circle Categories Codeforces Codeforces Round #385 (Div. 1) 10
384 Bear and Chemistry Categories Codeforces VK Cup 2016 - Round 1 10
385 To Play or not to Play Categories Codeforces Russian Code Cup 2017 - Finals [Unofficial Mirror, Div. 1 Only Recommended, Teams Allowed] 10
386 Puzzle Lover Categories Codeforces Codeforces Round #339 (Div. 1) 10
387 Mirror Box Categories Codeforces Codeforces Round #320 (Div. 1) [Bayan Thanks-Round] 10
388 The Beaver's Problem - 3 Categories Codeforces Abbyy Cup 2.0 - Final (unofficial) 10
389 Gears Categories Codeforces Codeforces Round #283 (Div. 1) 10
390 Bear and Rectangle Strips Categories Codeforces VK Cup 2017 - Round 1 10
391 Bearish Fanpages Categories Codeforces VK Cup 2016 - Round 3 10
392 Future Failure Categories Codeforces IndiaHacks 2nd Elimination 2017 (unofficial, unrated mirror, ICPC rules) 10
393 Power Substring Categories Codeforces Hello 2018 10
394 Bear and Bowling Categories Codeforces Codeforces Round #318 [RussianCodeCup Thanks-Round] (Div. 1) 10
395 Airplane Arrangements Categories Codeforces IndiaHacks 2nd Elimination 2017 (unofficial, unrated mirror, ICPC rules) 10
396 Appleman and a Game Categories Codeforces Codeforces Round #263 (Div. 1) 10
397 New Year and Cake Categories Codeforces Good Bye 2015 10
398 The Beaver's Problem - 3 Categories Codeforces Abbyy Cup 2.0 - Final (unofficial) 10
399 Military Trainings Categories Codeforces Abbyy Cup 2.0 - Final (unofficial) 10
400 New Year and Snowy Grid Categories Codeforces Good Bye 2016 10
401 Test Data Generation Categories Codeforces VK Cup 2017 - Round 3 10
402 World of Tank Categories Codeforces Codeforces Round #467 (Div. 1) 10
403 Satellites Categories Codeforces Russian Code Cup 2017 - Finals [Unofficial Mirror, Div. 1 Only Recommended, Teams Allowed] 10
404 Verifying Kingdom Categories Codeforces VK Cup 2017 - Round 2 10
405 Berland Miners Categories Codeforces VK Cup 2015 - Round 2 (unofficial online mirror, Div. 1 only) 10
406 Coprime Permutation Categories Codeforces Codeforces Round #363 (Div. 1) 10
407 Math, math everywhere Categories Codeforces Codeforces Round #397 by Kaspersky Lab and Barcelona Bootcamp (Div. 1 + Div. 2 combined) 10
408 Dreamoon and Notepad Categories Codeforces Codeforces Round #272 (Div. 1) 10
409 The Beaver's Problem - 3 Categories Codeforces Abbyy Cup 2.0 - Final (unofficial) 10
410 Military Trainings Categories Codeforces Abbyy Cup 2.0 - Final (unofficial) 10