Problemset - Codeforces

→ Pay attention

Before contest
Codeforces Round (Div. 2)
4 days
Register now »

*has extra registration

→ Filter Problems

Difficulty: —

Add tag

Problems

#	Name
103C	Russian Roulette constructive algorithms, greedy	1900	x944
103B	Cthulhu dfs and similar, dsu, graphs	1500	x8689
103A	Testing Pants for Sadness greedy, implementation, math	1100	x5932
102B	Sum of Digits implementation	1000	x25618
102A	Clothes brute force	1200	x2967
101E	Candies and Stones divide and conquer, dp	2500	x480
101D	Castle dp, greedy, probabilities, sortings, trees	2300	x676
101C	Vectors implementation, math	2000	x691
101B	Buses binary search, data structures, dp	1700	x2535
101A	Homework greedy	1200	x3767
100J	Interval Coloring *special problem, greedy, math	2400	x62
100I	Rotation *special problem, geometry, math	1500	x345
100H	Battleship *special problem, dfs and similar, implementation	2100	x76
100G	Name the album *special problem, data structures, implementation	1800	x112
100F	Polynom *special problem, implementation	1800	x135
100E	Lamps in a Line *special problem, math	1600	x269
100D	World of Mouth *special problem, strings	1500	x302
100C	A+B *special problem, implementation	1400	x527
100B	Friendly Numbers *special problem, implementation	1500	x540
100A	Carpeting the Room *special problem, implementation	1100	x910
99B	Help Chef Gerasim implementation, sortings	1300	x2935
99A	Help Far Away Kingdom strings	800	x6619
98E	Help Shrek and Donkey dp, games, math, probabilities	2700	x468
98D	Help Monks constructive algorithms	2500	x182
98C	Help Greg the Dwarf geometry, ternary search	2500	x304
98B	Help King implementation, probabilities, trees	2200	x118
98A	Help Victoria the Wise brute force, implementation	1700	x1177
97E	Leaders dfs and similar, dsu, graphs, trees	2200	x377
97D	Robot in Basement bitmasks, brute force, implementation	2700	x243
97C	Winning Strategy binary search, graphs, math, shortest paths	2400	x302
97B	Superset constructive algorithms, divide and conquer	2300	x813
97A	Domino brute force, implementation	2400	x261
96B	Lucky Numbers (easy) binary search, bitmasks, brute force	1300	x14998
96A	Football implementation, strings	900	x154128
95E	Lucky Country dp, dsu, graphs	2500	x1443
95D	Horse Races dp, math	2500	x422
95C	Volleyball shortest paths	1900	x2745
95B	Lucky Numbers dp, greedy	1800	x1200
95A	Hockey implementation, strings	1600	x1652
94B	Friends graphs, implementation, math	1300	x4582
94A	Restoring Password implementation, strings	900	x10376
93E	Lostborn dp, math, number theory	2600	x484
93D	Flags dp, math, matrices	2500	x344
93C	Azembler brute force, implementation	2500	x413
93B	End of Exams greedy	1900	x907
93A	Frames implementation	1700	x1922
92B	Binary Number greedy	1300	x4753
92A	Chips implementation, math	800	x18540
91E	Igloo Skyscraper data structures, geometry	2500	x594
91D	Grocer's Problem constructive algorithms, graphs, greedy	2600	x264
91C	Ski Base combinatorics, dsu, graphs	2300	x868
91B	Queue binary search, data structures	1500	x6691
91A	Newspaper Headline greedy, strings	1500	x3552
90B	African Crossword implementation, strings	1100	x5251
90A	Cableway greedy, math	1000	x4588
89E	Fire and Ice greedy	2900	x99
89D	Space mines geometry	2500	x232
89C	Chip Play brute force, data structures, implementation	2300	x615
89B	Widget Library dp, expression parsing, graphs, implementation	2300	x514
89A	Robbery greedy	1800	x1466
88B	Keyboard implementation	1500	x4519
88A	Chord brute force, implementation	1200	x3791
87E	Mogohu-Rea Idol geometry	2600	x563
87D	Beautiful Road dfs and similar, dp, dsu, graphs, implementation, sortings, trees	2300	x868
87C	Interesting Game dp, games, math	2000	x1317
87B	Vasya and Types implementation, strings	1800	x1123
87A	Trains implementation, math	1500	x5287
86E	Long sequence brute force, math, matrices	2700	x180
86D	Powerful array data structures, implementation, math, two pointers	2200	x13295
86C	Genetic engineering dp, string suffix structures, trees	2500	x698
86B	Tetris revisited constructive algorithms, graph matchings, greedy, math	2200	x405
86A	Reflection math	1600	x1359
85E	Guard Towers binary search, dsu, geometry, graphs, sortings	2600	x944
85D	Sum of Medians binary search, brute force, data structures, implementation	2300	x2001
85C	Petya and Tree binary search, dfs and similar, probabilities, sortings, trees	2200	x524
85B	Embassy Queue data structures, greedy	1800	x965
85A	Domino constructive algorithms, implementation	1300	x1774
84C	Biathlon binary search, implementation	1700	x1610
84A	Toy Army math, number theory	900	x14793
83E	Two Subsequences bitmasks, dp	2800	x465
83D	Numbers dp, math, number theory	2400	x845
83C	Track graphs, greedy, shortest paths	2400	x409
83B	Doctor binary search, math, sortings	1800	x1631
83A	Magical Array math	1300	x6171
82E	Corridor geometry	2600	x217
82D	Two out of Three dp	2000	x1960
82C	General Mobilization data structures, dfs and similar, sortings	2000	x804
82B	Sets constructive algorithms, hashing, implementation	1700	x2023
82A	Double Cola implementation, math	1100	x29897
81E	Pairs dfs and similar, dp, dsu, graphs, implementation, trees	2700	x333
81D	Polycarp's Picture Gallery constructive algorithms, greedy	2100	x642
81C	Average Score greedy, math, sortings	1700	x1655
81B	Sequence Formatting implementation, strings	1700	x1925
81A	Plug-in implementation	1400	x10473
80B	Depression geometry, math	1200	x4352
80A	Panoramix's Prediction brute force	800	x51644
79E	Security System math	2900	x128
79D	Password bitmasks, dp, shortest paths	2800	x1072
79C	Beaver data structures, dp, greedy, hashing, strings, two pointers	1800	x1748
79B	Colorful Field implementation, sortings	1400	x7008