Problemset - Codeforces

→ Pay attention

Before contest
European Championship 2025 - Online Mirror (Unrated, ICPC Rules, Teams Preferred)
23:24:05
Register now »

*has extra registration

→ Filter Problems

Difficulty: —

Add tag

Problems

#	Name
1647A	Madoka and Math Dad implementation, math	800	x22977
1646B	Quality vs Quantity brute force, constructive algorithms, greedy, sortings, two pointers	800	x21477
1646A	Square Counting math	800	x24545
1644B	Anti-Fibonacci Permutation brute force, constructive algorithms, implementation	800	x20854
1644A	Doors and Keys implementation	800	x27669
1642B	Power Walking greedy	900	x17290
1642A	Hard Way geometry	800	x16405
1638A	Reverse constructive algorithms, greedy, math	800	x21655
1637A	Sorting Parts brute force, sortings	800	x22559
1635B	Avoid Local Maximums greedy	800	x18045
1635A	Min Or Sum bitmasks, greedy	800	x23565
1634A	Reverse and Concatenate greedy, strings	800	x24115
1633B	Minority greedy	800	x28149
1633A	Div. 7 brute force	800	x33982
1632A	ABC implementation	800	x29949
1631A	Min Max Swap greedy	800	x29991
1629B	GCD Arrays greedy, math, number theory	800	x23854
1629A	Download More RAM brute force, greedy, sortings	800	x29655
1627A	Not Shading constructive algorithms, implementation	800	x24269
1626A	Equidistant Letters constructive algorithms, sortings	800	x29612
1625A	Ancient Civilization bitmasks, greedy, math	800	x17465
1624B	Make AP implementation, math	900	x39562
1624A	Plus One on the Subset math	800	x54180
1623A	Robot Cleaner brute force, implementation, math	800	x20219
1622A	Construct a Rectangle geometry, math	800	x30728
1621A	Stable Arrangement of Rooks constructive algorithms	800	x24124
1620A	Equal or Not Equal constructive algorithms, dsu, implementation	800	x21917
1619B	Squares and Cubes implementation, math	800	x31443
1619A	Square String? implementation, strings	800	x54978
1618B	Missing Bigram implementation	800	x22956
1618A	Polycarp and Sums of Subsequences math, sortings	800	x32869
1617B	GCD Problem brute force, constructive algorithms, math, number theory	900	x24240
1617A	Forbidden Subsequence constructive algorithms, greedy, sortings, strings	800	x16433
1616A	Integer Diversity implementation	800	x23097
1615A	Closing The Gap greedy, math	800	x21001
1614A	Divan and a Store brute force, constructive algorithms, greedy	800	x23727
1613A	Long Comparison implementation, math	900	x25083
1612B	Special Permutation constructive algorithms, greedy	900	x17584
1612A	Distance brute force, constructive algorithms	800	x17800
1611B	Team Composition: Programmers and Mathematicians binary search, constructive algorithms, math	800	x30357
1611A	Make Even constructive algorithms, math	800	x31914
1610A	Anti Light's Cell Guessing math	900	x16372
1609A	Divide and Multiply greedy, implementation, math, number theory	900	x17486
1608A	Find Array constructive algorithms, math	800	x19313
1607B	Odd Grasshopper math	900	x28388
1607A	Linear Keyboard implementation, strings	800	x38316
1606A	AB Balance strings	900	x26765
1605A	A.M. Deviation math, number theory	800	x20827
1604A	Era greedy	800	x21853
1602A	Two Subsequences implementation	800	x19176
1598A	Computer Game brute force, dfs and similar, dp, implementation	800	x23918
1594A	Consecutive Sum Riddle math	800	x25282
1593B	Make it Divisible by 25 dfs and similar, dp, greedy, math, math	900	x29445
1593A	Elections math	800	x38274
1592A	Gamer Hemose binary search, greedy, math, sortings	800	x22703
1585B	Array Eversion greedy	900	x15432
1585A	Life of a Flower implementation	800	x18044
1584C	Two Arrays greedy, math, sortings	900	x16862
1584A	Mathematical Addition math	800	x15045
1583A	Windblume Ode math, number theory	800	x13863
1582B	Luntik and Subsequences combinatorics, math	900	x22588
1582A	Luntik and Concerts math	800	x18774
1581A	CQXYM Count Permutations combinatorics, math, number theory	800	x13615
1579A	Casimir's String Solitaire math, strings	800	x39744
1574A	Regular Bracket Sequences constructive algorithms	800	x22221
1573A	Countdown greedy	800	x21375
1571A	Sequence of Comparisons *special problem	800	x1386
1569A	Balanced Substring implementation	800	x25790
1567A	Domino Disaster implementation, strings	800	x30520
1566B	MIN-MEX Cut bitmasks, constructive algorithms, dp, greedy	800	x20217
1566A	Median Maximization binary search, greedy, math	800	x23909
1562A	The Miracle and the Sleeper greedy, math	800	x25828
1561A	Simply Strange Sort brute force, implementation, sortings	800	x16770
1560C	Infinity Table implementation, math	800	x26995
1560B	Who's Opposite? math	800	x36627
1560A	Dislike of Threes implementation	800	x63475
1559B	Mocha and Red and Blue dp, greedy	900	x22914
1559A	Mocha and Math bitmasks, constructive algorithms, math	900	x33858
1557A	Ezzat and Two Subsequences brute force, math, sortings	800	x28234
1556A	A Variety of Operations math	800	x18174
1555A	PizzaForces brute force, math	900	x28859
1554A	Cherry greedy	800	x29900
1553A	Digits Sum math, number theory	800	x31960
1552A	Subsequence Permutation sortings, strings	800	x24155
1551B1	Wonderful Coloring - 1 greedy, strings	800	x30028
1551A	Polycarp and Coins greedy, math	800	x53368
1550A	Find The Array greedy, math	800	x28503
1549B	Gregor and the Pawn Game dfs and similar, dp, flows, graph matchings, graphs, greedy, implementation	800	x25011
1549A	Gregor and Cryptography math, number theory	800	x33385
1547B	Alphabetical Strings greedy, implementation, strings	800	x26868
1547A	Shortest Path with Obstacle implementation, math	800	x31046
1546A	AquaMoon and Two Arrays brute force, greedy	800	x18339
1543B	Customising the Track combinatorics, greedy, math	900	x23575
1543A	Exciting Bets greedy, math, number theory	900	x30336
1542A	Odd Set math	800	x46547
1541A	Pretty Permutations constructive algorithms, greedy, implementation	800	x29773
1539B	Love Song dp, implementation, strings	800	x25154
1538B	Friends and Candies greedy, math	800	x32099
1538A	Stone Game brute force, dp, greedy	800	x37755
1537B	Bad Boy constructive algorithms, greedy, math	900	x32167