Problemset - Codeforces

→ Pay attention

Before contest
Codeforces Round (Div. 1 + Div. 2)
13 days

→ Filter Problems

Difficulty: —

Add tag

Problems

#	Name
1804A	Lame King greedy, math	800	x18809
1802B	Settlement of Guinea Pigs greedy, implementation, math	1000	x14913
1802A	Likes greedy, implementation	800	x16815
1801G	A task for substrings data structures, string suffix structures, strings	3400	x767
1801F	Another n-dimensional chocolate bar dp, math, meet-in-the-middle, number theory	2700	x763
1801E	Gasoline prices data structures, divide and conquer, dsu, hashing, trees	3000	x789
1801D	The way home binary search, data structures, dp, graphs, greedy, shortest paths, sortings	2100	x3016
1801C	Music Festival binary search, data structures, dp, greedy, sortings	1900	x4226
1801B	Buying gifts data structures, greedy, sortings	1800	x7822
1801A	The Very Beautiful Blanket bitmasks, constructive algorithms	1600	x9937
1800G	Symmetree dfs and similar, hashing, implementation, trees	2200	x2669
1800F	Dasha and Nightmares bitmasks, hashing, meet-in-the-middle, strings	1900	x4925
1800E2	Unforgivable Curse (hard version) brute force, constructive algorithms, dfs and similar, dsu, graphs, greedy, strings	1500	x15753
1800E1	Unforgivable Curse (easy version) brute force, constructive algorithms, dsu, graphs, greedy, strings	1400	x16075
1800D	Remove Two Letters data structures, greedy, hashing, strings	1200	x30553
1800C2	Powering the Hero (hard version) data structures, greedy	1100	x28163
1800C1	Powering the Hero (easy version) data structures, greedy	1000	x27788
1800B	Count the Number of Pairs greedy, strings	1000	x29170
1800A	Is It a Cat? implementation, strings	800	x37809
1799H	Tree Cutting bitmasks, dfs and similar, dp	3200	x548
1799G	Count Voting combinatorics, dp, math	2600	x1139
1799F	Halve or Subtract binary search, brute force, dp, greedy, sortings	2700	x1122
1799E	City Union constructive algorithms, dfs and similar, dsu, geometry, greedy, implementation, math	2300	x1446
1799D2	Hot Start Up (hard version) data structures, dp	2100	x3211
1799D1	Hot Start Up (easy version) dp	1900	x6183
1799C	Double Lexicographically Minimum greedy, strings	1700	x7075
1799B	Equalize by Divide brute force, constructive algorithms, greedy, math	1200	x13006
1799A	Recent Actions data structures, greedy, implementation, math	800	x12509
1798F	Gifts from Grandfather Ahmed dp, math, number theory	2500	x698
1798E	Multitest Generator brute force, dp	2300	x2139
1798D	Shocking Arrangement constructive algorithms, greedy, math	1600	x15202
1798C	Candy Store greedy, math, number theory	1700	x9623
1798B	Three Sevens brute force, data structures, greedy, implementation	1000	x19146
1798A	Showstopper greedy, implementation, sortings	800	x21199
1797F	Li Hua and Path data structures, dfs and similar, divide and conquer, dsu, trees	3000	x719
1797E	Li Hua and Array brute force, data structures, dsu, math, number theory, two pointers	2300	x1722
1797D	Li Hua and Tree brute force, data structures, dfs and similar, dp, implementation, trees	1900	x4756
1797C	Li Hua and Chess constructive algorithms, greedy, interactive	1600	x9147
1797B	Li Hua and Pattern constructive algorithms, greedy	1100	x27134
1797A	Li Hua and Maze constructive algorithms, flows, graphs, greedy, implementation	800	x19844
1796F	Strange Triples brute force, math, number theory	2900	x267
1796E	Colored Subgraphs dfs and similar, dp, games, greedy, trees	2500	x1083
1796D	Maximum Subarray data structures, dp, greedy, two pointers	2000	x5631
1796C	Maximum Set binary search, math	1600	x12490
1796B	Asterisk-Minor Template implementation, strings	1000	x18599
1796A	Typical Interview Problem brute force, implementation, strings	800	x19804
1795G	Removal Sequences bitmasks, dfs and similar, graphs	2700	x863
1795F	Blocking Chips binary search, constructive algorithms, dfs and similar, greedy, trees	2400	x1439
1795E	Explosions? binary search, data structures, dp, greedy, math	2200	x2475
1795D	Triangle Coloring combinatorics, math	1600	x14156
1795C	Tea Tasting binary search, data structures, implementation	1500	x19552
1795B	Ideal Point brute force, geometry, greedy	900	x24518
1795A	Two Towers brute force, implementation, strings	800	x24848
1794E	Labeling the Tree with Distances data structures, dp, greedy, hashing, implementation, trees	2400	x1614
1794D	Counting Factorizations combinatorics, divide and conquer, dp, math, number theory	1900	x4719
1794C	Scoring Subsequences binary search, greedy, math, two pointers	1300	x24191
1794B	Not Dividing constructive algorithms, greedy, math	900	x44902
1794A	Prefix and Suffix Array strings	800	x19163
1793F	Rebrending brute force, data structures, divide and conquer, implementation	2600	x1684
1793E	Velepin and Marketing binary search, data structures, dp, greedy, sortings, two pointers	2600	x1391
1793D	Moscow Gorillas binary search, dp, greedy, implementation, math, two pointers	1800	x7281
1793C	Dora and Search constructive algorithms, data structures, two pointers	1200	x36707
1793B	Fedya and Array constructive algorithms, math	1100	x17313
1793A	Yet Another Promotion greedy, math	800	x18931
1792F2	Graph Coloring (hard version) brute force, combinatorics, divide and conquer, dp, fft, graphs	2900	x577
1792F1	Graph Coloring (easy version) combinatorics, dp, graphs	2700	x1058
1792E	Divisors and Table brute force, dfs and similar, dp, number theory	2400	x1647
1792D	Fixed Prefix Permutations binary search, bitmasks, data structures, hashing, math, sortings	1700	x8495
1792C	Min Max Sort binary search, brute force, greedy, math, two pointers	1500	x17277
1792B	Stand-up Comedian greedy, math	1200	x24641
1792A	GamingForces greedy, sortings	800	x31603
1791G2	Teleporters (Hard Version) binary search, greedy, sortings	1900	x6253
1791G1	Teleporters (Easy Version) greedy, sortings	1100	x37036
1791F	Range Update Point Query binary search, brute force, data structures	1500	x16112
1791E	Negatives and Positives dp, greedy, sortings	1100	x44774
1791D	Distinct Split brute force, greedy, strings	1000	x54668
1791C	Prepend and Append implementation, two pointers	800	x82319
1791B	Following Directions geometry, implementation	800	x54092
1791A	Codeforces Checking implementation, strings	800	x84811
1790G	Tokens on Graph constructive algorithms, dfs and similar, graphs, shortest paths	2300	x1360
1790F	Timofey and Black-White Tree brute force, dfs and similar, divide and conquer, graphs, greedy, math, shortest paths, trees	2100	x4221
1790E	Vlad and a Pair of Numbers bitmasks, constructive algorithms	1400	x17749
1790D	Matryoshkas data structures, greedy, sortings	1200	x34844
1790C	Premutation brute force, implementation, math	1000	x27329
1790B	Taisia and Dice greedy, greedy, math	800	x29301
1790A	Polycarp and the Day of Pi implementation, math, strings	800	x41631
1789F	Serval and Brain Power bitmasks, brute force, dp, greedy, implementation, strings	2700	x1040
1789E	Serval and Music Game brute force, dp, implementation, math, number theory	2500	x1013
1789D	Serval and Shift-Shift-Shift bitmasks, brute force, constructive algorithms, implementation	2200	x1978
1789C	Serval and Toxel's Arrays combinatorics, dp, implementation, math	1500	x10134
1789B	Serval and Inversion Magic brute force, implementation, strings, two pointers	800	x17784
1789A	Serval and Mocha's Array brute force, math, number theory	800	x37897
1788F	XOR, Tree, and Queries bitmasks, constructive algorithms, dfs and similar, dsu, graphs, greedy, implementation, trees	2500	x1264
1788E	Sum Over Zero data structures, dfs and similar, dp	2200	x3543
1788D	Moving Dots binary search, brute force, combinatorics, math, two pointers	2000	x4832
1788C	Matching Numbers constructive algorithms, greedy, math	1300	x19782
1788B	Sum of Two Numbers constructive algorithms, greedy, implementation, math, probabilities	1100	x22780
1788A	One and Two brute force, implementation, math	800	x59678
1787I	Treasure Hunt data structures, divide and conquer, two pointers	3400	x464
1787H	Codeforces Scoreboard binary search, data structures, dp, geometry	3300	x354

The only programming contests Web 2.0 platform

Server time: Sep/27/2026 11:45:56 (g2).

Desktop version, switch to mobile version.

Supported by