Problemset - Codeforces

→ Pay attention

Before contest
Good Bye 2024: 2025 is NEAR
4 days

→ Filter Problems

Difficulty: —

Add tag

Problems

#	Name
1714E	Add Modulo 10 brute force, math, number theory	1400	x17142
1714D	Color with Occurrences brute force, data structures, dp, greedy, strings	1600	x9254
1714C	Minimum Varied Number greedy	800	x31353
1714B	Remove Prefix data structures, greedy, implementation	800	x30779
1714A	Everyone Loves to Sleep implementation, math	900	x30130
1713F	Lost Array bitmasks, combinatorics, constructive algorithms, dp, math	2900	x554
1713E	Cross Swapping 2-sat, data structures, dsu, greedy, matrices	2400	x1741
1713D	Tournament Countdown constructive algorithms, greedy, interactive, number theory, probabilities	1800	x5752
1713C	Build Permutation constructive algorithms, dp, math	1200	x17596
1713B	Optimal Reduction constructive algorithms, sortings	1000	x21522
1713A	Traveling Salesman Problem geometry, greedy, implementation	800	x22079
1712F	Triameter binary search, data structures, dfs and similar, trees	3200	x339
1712E2	LCM Sum (hard version) brute force, data structures, math, number theory, two pointers	2500	x1387
1712E1	LCM Sum (easy version) binary search, brute force, combinatorics, math, number theory, two pointers	2300	x2218
1712D	Empty Graph binary search, constructive algorithms, data structures, greedy, shortest paths	2000	x4589
1712C	Sort Zero greedy, sortings	1100	x20044
1712B	Woeful Permutation constructive algorithms, greedy, number theory	800	x21720
1712A	Wonderful Permutation greedy, implementation	800	x24208
1711B	Party brute force, graphs	1300	x13516
1711A	Perfect Permutation constructive algorithms	800	x25328
1710E	Two Arrays binary search, games, graph matchings	2400	x517
1710D	Recover the Tree constructive algorithms, trees	3400	x427
1710C	XOR Triangle bitmasks, brute force, constructive algorithms, dp, greedy, math	2500	x1400
1710B	Rain binary search, brute force, data structures, geometry, greedy, implementation, math	2100	x2509
1710A	Color the Picture constructive algorithms, greedy, math	1500	x11034
1709F	Multiset of Strings bitmasks, brute force, dp, fft, flows, graphs, math, meet-in-the-middle, trees	2500	x573
1709E	XOR Tree bitmasks, data structures, dfs and similar, dsu, greedy, trees	2400	x2828
1709D	Rorororobot binary search, data structures, greedy, math	1700	x8555
1709C	Recover an RBS constructive algorithms, greedy, implementation, strings	1800	x8957
1709B	Also Try Minecraft data structures, dp, implementation	900	x23111
1709A	Three Doors brute force, greedy, implementation, math	800	x29907
1708B	Difference of GCDs constructive algorithms, math	1100	x21286
1708A	Difference Operations greedy, math	800	x21873
1707F	Bugaboo bitmasks, constructive algorithms, dp, number theory	3500	x154
1707E	Replace binary search, data structures	3500	x739
1707D	Partial Virtual Trees combinatorics, dfs and similar, dp, math, trees	3000	x667
1707C	DFS Trees dfs and similar, dsu, graphs, greedy, sortings, trees	2400	x1575
1707B	Difference Array brute force, data structures, implementation, sortings	1900	x5835
1707A	Doremy's IQ binary search, constructive algorithms, greedy, implementation	1600	x13828
1706E	Qpwoeirut and Vertices binary search, data structures, dfs and similar, divide and conquer, dsu, greedy, trees	2300	x2813
1706D2	Chopping Carrots (Hard Version) brute force, constructive algorithms, data structures, dp, greedy, math, number theory, two pointers	2400	x1735
1706D1	Chopping Carrots (Easy Version) binary search, brute force, constructive algorithms, greedy, number theory	1700	x7091
1706C	Qpwoeirut And The City dp, flows, greedy, implementation	1400	x15102
1706B	Making Towers dp, greedy, math	1100	x16692
1706A	Another String Minimization Problem 2-sat, constructive algorithms, greedy, string suffix structures, strings	800	x23112
1705F	Mark and the Online Exam bitmasks, constructive algorithms, interactive, probabilities	2900	x625
1705E	Mark and Professor Koro binary search, bitmasks, brute force, combinatorics, data structures, greedy	2300	x2124
1705D	Mark and Lightbulbs combinatorics, constructive algorithms, greedy, math, sortings	1800	x6428
1705C	Mark and His Unfinished Essay brute force, implementation	1400	x13484
1705B	Mark the Dust Sweeper constructive algorithms, greedy, implementation	900	x23394
1705A	Mark the Photographer greedy, sortings	800	x25449
1704H2	Game of AI (hard version) combinatorics, fft, math	3500	x93
1704H1	Game of AI (easy version) combinatorics, constructive algorithms, dp, fft, math	3200	x187
1704G	Mio and Lucky Array constructive algorithms, fft, math, strings	3500	x115
1704F	Colouring Game constructive algorithms, dp, games	2600	x1070
1704E	Count Seconds brute force, constructive algorithms, dp, graphs, implementation, math	2200	x2398
1704D	Magical Array constructive algorithms, hashing, implementation, math	1900	x5090
1704C	Virus greedy, implementation, sortings	1200	x16450
1704B	Luke is a Foodie brute force, greedy, implementation	1000	x18904
1704A	Two 0-1 Sequences constructive algorithms, greedy	800	x16085
1703G	Good Key, Bad Key bitmasks, brute force, dp, greedy, math	1600	x10986
1703F	Yet Another Problem About Pairs Satisfying an Inequality binary search, data structures, dp, greedy, sortings	1300	x20835
1703E	Mirror Grid implementation	1200	x19058
1703D	Double Strings brute force, data structures, strings	1100	x26178
1703C	Cypher brute force, implementation, strings	800	x36286
1703B	ICPC Balloons data structures, implementation	800	x51323
1703A	YES or YES? brute force, implementation, strings	800	x73021
1702G2	Passable Paths (hard version) data structures, dfs and similar, trees	2000	x4768
1702G1	Passable Paths (easy version) dfs and similar, trees	1900	x5544
1702F	Equate Multisets constructive algorithms, data structures, greedy, math, number theory	1700	x8530
1702E	Split Into Two Sets dfs and similar, dsu, graphs	1600	x13729
1702D	Not a Cheap String greedy	1000	x23973
1702C	Train and Queries data structures, greedy	1100	x22735
1702B	Polycarp Writes a String from Memory greedy	800	x27851
1702A	Round Down the Price constructive algorithms	800	x35288
1701F	Points combinatorics, data structures, implementation, math, matrices	2500	x958
1701E	Text Editor brute force, dp, greedy, strings	2500	x1159
1701D	Permutation Restoration binary search, data structures, greedy, math, sortings, two pointers	1900	x5749
1701C	Schedule Management binary search, greedy, implementation, two pointers	1400	x17585
1701B	Permutation greedy	800	x20280
1701A	Grass Field implementation	800	x26499
1700F	Puzzle constructive algorithms, dp, greedy	2600	x952
1700E	Serega the Pirate brute force, constructive algorithms	2600	x882
1700D	River Locks binary search, dp, greedy, math	1900	x6201
1700C	Helping the Nature constructive algorithms, data structures, greedy	1700	x11089
1700B	Palindromic Numbers constructive algorithms, implementation, math	1100	x18932
1700A	Optimal Path constructive algorithms, greedy, math	800	x23012
1699E	Three Days Grace data structures, dp, greedy, math, number theory, two pointers	2600	x1229
1699D	Almost Triple Deletions data structures, dp, greedy	2300	x3180
1699C	The Third Problem combinatorics, constructive algorithms, math	1700	x9911
1699B	Almost Ternary Matrix bitmasks, constructive algorithms, matrices	900	x19996
1699A	The Third Three Number Problem constructive algorithms, math	800	x24133
1698G	Long Binary String bitmasks, math, matrices, meet-in-the-middle, number theory	2900	x324
1698F	Equal Reversal constructive algorithms, graphs, implementation, math	2800	x656
1698E	PermutationForces II brute force, combinatorics, greedy, sortings, trees, two pointers	2300	x1662
1698D	Fixed Point Guessing binary search, constructive algorithms, interactive	1600	x9628
1698C	3SUM Closure brute force, data structures	1300	x18692
1698B	Rising Sand constructive algorithms, greedy, implementation	800	x21017
1698A	XOR Mixup bitmasks, brute force	800	x29632
1697F	Too Many Constraints 2-sat, constructive algorithms, graphs, implementation	2800	x576