Problemset - Codeforces

→ Pay attention

Before contest
Codeforces Round (Div. 2)
5 days

→ Filter Problems

Difficulty: —

Add tag

Problems

#	Name
2217H	Closer dfs and similar, dp, trees	2800	x211
2217G	Down the Pivot combinatorics, dp, math, trees	2600	x363
2217F	Interval Game bitmasks, combinatorics, constructive algorithms, dp, games, games, greedy, greedy, math, probabilities	2300	x730
2215D	EXPloration, EXPloitation, and Gain Some EXPerience! bitmasks, brute force, dp, greedy, implementation	2800	x118
2211F	Learning Binary Search combinatorics, divide and conquer, dp, math	2400	x935
2211E	Minimum Path Cover brute force, dp, greedy, interactive, interactive, math, number theory, trees	2500	x865
2210C2	A Simple GCD Problem (Hard Version) dp, greedy, number theory	2100	x2178
2209E	A Trivial String Problem brute force, dp, hashing, string suffix structures, strings	2200	x1803
2208E	Counting Cute Arrays combinatorics, dp	2700	x430
2207F	Hanabi binary search, data structures, dp, dsu, flows, graph matchings, graphs, greedy	2900	x270
2207D	Boxed Like a Fish dfs and similar, dp, games, shortest paths, trees	2200	x2131
2206I	Growth Factor combinatorics, dp, math, number theory	2900	x169
2206D	Christmas Tree Un-decoration data structures, dp, trees	2600	x243
2205E	Simons and Dividing the Rhythm combinatorics, data structures, dp, dsu, math, string suffix structures, strings, strings, strings	2100	x1584
2204G	Grid Path dp, dp, graphs, matrices	2700	x408
2203F	Binary Search with One Swap binary search, divide and conquer, dp, hashing, math, two pointers	2600	x417
2201C	Rigged Bracket Sequence combinatorics, dp, greedy	2000	x2006
2200G	Operation Permutation combinatorics, dp, math, probabilities	2200	x1040
2199H	Sum of MEX *special problem, combinatorics, data structures, dp, math	2300	x91
2196E2	Fuzzy Concatenation (Hard version) binary search, bitmasks, data structures, dp, greedy, string suffix structures	3000	x200
2196D	Double Bracket Sequence data structures, dp, expression parsing, flows, greedy, strings	2500	x1001
2196C2	Interactive Graph (Hard Version) combinatorics, dfs and similar, dp, graphs, interactive	2000	x2532
2195G	Idiot First Search and Queries binary search, data structures, dp, graphs, trees	2300	x1053
2195F	Parabola Independence dp, graphs, greedy, math, sortings	2000	x2719
2194F2	Again Trees... (hard version) bitmasks, data structures, dfs and similar, dp, fft, trees	3000	x170
2194F1	Again Trees... (Easy Version) bitmasks, dfs and similar, dp, trees	2300	x895
2194E	The Turtle Strikes Back dp, graphs, greedy, implementation	2000	x2647
2193H	Remove the Grail Tree dfs and similar, dp, graphs, greedy, implementation, trees	2400	x1050
2192F	Fish Fight dp, dp, math, probabilities, probabilities	2900	x173
2190F	Xor Product bitmasks, dp	3300	x93
2189F	Zhora the Vacuum Cleaner data structures, dfs and similar, dp, greedy, implementation, sortings, trees	2800	x227
2189D2	Little String (Hard Version) combinatorics, dp, greedy, math, number theory	2200	x1948
2187F2	Al Fine (Counting Version) dp, trees	3500	x72
2187E	Doors and Keys brute force, data structures, dp	3500	x331
2187D	Cool Problem bitmasks, dp, math	2600	x637
2185H	BattleCows 2 binary search, brute force, data structures, dp, greedy	2500	x685
2183H	Minimise Cost binary search, dp, greedy, sortings	3500	x159
2183F	Jumping Man brute force, combinatorics, dfs and similar, dp, trees	2500	x1132
2183E	LCM is Legendary Counting Master dp, math, number theory	2100	x2864
2182G	Short Garland combinatorics, data structures, dfs and similar, dp, trees	2800	x353
2182F1	Christmas Reindeer (easy version) bitmasks, brute force, combinatorics, dp, math	2300	x1273
2181J	Jinx or Jackpot brute force, dp, math, probabilities	2300	x714
2181G	Greta's Game binary search, dp, graphs, greedy, math	2400	x651
2180F2	Control Car (Hard Version) combinatorics, dp, matrices, probabilities	3200	x223
2180F1	Control Car (Easy Version) combinatorics, dp, probabilities	2800	x406
2180E	No Effect XOR bitmasks, divide and conquer, dp, greedy, math	2300	x1745
2179H	Blackslex and Plants bitmasks, data structures, dp, implementation, math	2200	x1308
2178I	Numbers or Fireworks bitmasks, combinatorics, dp, graphs	3300	x219
2178G	deCH OR Dations bitmasks, data structures, dp, hashing, probabilities	2800	x594
2176F	Omega Numbers bitmasks, combinatorics, dp, math, number theory	2400	x1495
2176E	Remove at the lowest cost data structures, dfs and similar, dp, dsu, greedy, implementation, trees	2400	x1280
2174F	Mosaic Tree combinatorics, dp, fft, math, trees	2800	x467
2174D	Secret Message data structures, dp, greedy, trees	3400	x293
2172L	Maximum Color Segment dp, implementation	2300	x804
2172D	Divisor Card Game combinatorics, dp	3100	x103
2171H	Shiori Miyagi and Maximum Array Score binary search, data structures, dp, sortings	2400	x1021
2170F	Build XOR on a Segment bitmasks, dp	2600	x783
2170E	Binary Strings and Blocks combinatorics, data structures, dp	2100	x2327
2169F	Subsequence Problem combinatorics, dp, fft, math	2700	x337
2169E	Points Selection dp, greedy	2400	x1049
2165E	Rainbow Branch constructive algorithms, dp, greedy, trees	3200	x260
2164F2	Chain Prefix Rank (Hard Version) binary search, combinatorics, data structures, dfs and similar, dp, graphs, math, trees	2900	x424
2164F1	Chain Prefix Rank (Easy Version) combinatorics, dfs and similar, dp, math, trees	2600	x659
2162H	Beautiful Problem dp	2900	x314
2161D	Locked Out binary search, data structures, dp, greedy	2100	x2780
2159D2	Inverse Minimum Partition (Hard Version) dp, greedy, math	3200	x396
2159D1	Inverse Minimum Partition (Easy Version) binary search, brute force, dp, geometry, greedy, math, two pointers	2500	x1037
2159B	Rectangles brute force, data structures, dp, dsu, greedy, implementation, two pointers	2100	x2354
2157I	Hyper Smawk Bros dp, dp, games	3500	x171
2157G	Isaac's Queries bitmasks, brute force, constructive algorithms, dfs and similar, divide and conquer, dp, greedy, interactive, math, probabilities	2800	x411
2156E	Best Time to Buy and Sell Stock binary search, brute force, data structures, dp, games, graphs, greedy	2500	x963
2154F2	Bombing (Hard Version) combinatorics, dp	3300	x175
2152H1	Victorious Coloring (Easy Version) dfs and similar, dp, greedy	2900	x660
2150D	Attraction Theory combinatorics, dp, math	2700	x753
2150C	Limited Edition Shop data structures, dp	2100	x2694
2146F	Bubble Sort brute force, combinatorics, dp	2900	x303
2145G	Cost of Coloring combinatorics, divide and conquer, dp, fft, math	2900	x524
2145F	Long Journey dfs and similar, divide and conquer, dp, graphs, greedy, math, matrices, number theory	2500	x985
2144F	Bracket Groups brute force, constructive algorithms, dp, string suffix structures, strings	2700	x920
2144E2	Looking at Towers (difficult version) combinatorics, data structures, dp	2500	x1437
2144E1	Looking at Towers (easy version) combinatorics, dp	2200	x2559
2143D2	Inversion Graph Coloring (Hard Version) binary search, combinatorics, data structures, dp, two pointers	2200	x2778
2141E	Perfect Cut *special problem, dp, greedy	2100	x257
2140E2	Prime Gaming (Hard Version) bitmasks, combinatorics, dp, probabilities	2500	x1240
2140E1	Prime Gaming (Easy Version) bitmasks, combinatorics, dp	2200	x2112
2138C2	Maple and Tree Beauty (Hard Version) bitmasks, brute force, dfs and similar, dp, fft, trees	2000	x3376
2137G	Cry Me a River dfs and similar, dp, games, graphs	2200	x1939
2135E2	Beyond the Palindrome (Hard Version) combinatorics, dp, math, number theory	3500	x166
2135E1	Beyond the Palindrome (Easy Version) combinatorics, dp, math	3300	x258
2134F	Permutation Oddness combinatorics, dp, math	2900	x647
2134E	Power Boxes constructive algorithms, dp, implementation, interactive	2300	x2404
2133F	Flint and Steel data structures, dp, graphs	3000	x467
2133E	I Yearned For The Mines constructive algorithms, dfs and similar, dp, greedy, trees	2500	x1697
2131G	Wafu! bitmasks, brute force, data structures, dfs and similar, dp, math	2000	x3779
2129D	Permutation Blackhole brute force, combinatorics, dp, implementation, math	2600	x989
2129C3	Interactive RBS (Hard Version) binary search, bitmasks, constructive algorithms, dp, interactive	2300	x1669
2127H	23 Rises Again brute force, dfs and similar, dp, flows, graph matchings, graphs, greedy, implementation, probabilities, trees	3100	x590
2127F	Hamed and AghaBalaSar brute force, combinatorics, dp, math, probabilities	2800	x1115
2126G1	Big Wins! (easy version) binary search, data structures, dp, dsu, two pointers	2200	x2490
2125F	Timofey and Docker binary search, divide and conquer, dp	3000	x399

←

The only programming contests Web 2.0 platform

Server time: May/11/2026 15:31:06 (g2).

Desktop version, switch to mobile version.

Supported by