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