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