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