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