Problemset - Codeforces

Please read the new rule regarding the restriction on the use of AI tools. ×

→ Pay attention

Before contest
Codeforces Round 976 (Div. 2) and Divide By Zero 9.0
00:04:28

*has extra registration

Before contest
Kotlin Heroes: Episode 11
23:04:28
Register now »

→ Filter Problems

Difficulty: —

Add tag

Problems

#	Name
1610I	Mashtali vs AtCoder games, trees	3100	x283
1610H	Squid Game data structures, dfs and similar, greedy, trees	3100	x495
1610G	AmShZ Wins a Bet data structures, greedy, hashing	3300	x440
1610F	Mashtali: a Space Oddysey constructive algorithms, dfs and similar, graphs	3000	x535
1610E	AmShZ and G.O.A.T. binary search, brute force, greedy, implementation, math	2300	x1670
1610D	Not Quite Lee combinatorics, dp, math, number theory	2000	x2702
1610C	Keshi Is Throwing a Party binary search, greedy	1600	x11534
1609H	Pushing Robots	3500	x92
1609G	A Stroll Around the Matrix data structures, greedy, math	3000	x398
1609F	Interesting Sections data structures, divide and conquer, meet-in-the-middle, two pointers	2800	x784
1609E	William The Oblivious bitmasks, data structures, dp, matrices	2400	x2073
1609D	Social Network dsu, graphs, greedy, implementation, trees	1600	x7293
1609C	Complex Market Analysis binary search, dp, implementation, number theory, schedules, two pointers	1400	x9724
1608G	Alphabetic Tree binary search, data structures, dfs and similar, hashing, string suffix structures, strings, trees	3500	x157
1608F	MEX counting combinatorics, dp, implementation	3200	x594
1608E	The Cells on the Paper binary search, implementation, sortings	2800	x434
1608D	Dominoes combinatorics, fft, graphs, math, number theory	2400	x1390
1608C	Game Master data structures, dfs and similar, dp, graphs, greedy, two pointers	1700	x6646
1607H	Banquet Preparations 2 greedy, sortings, two pointers	2200	x1238
1607G	Banquet Preparations 1 greedy	2200	x1560
1607F	Robot on the Board 2 brute force, dfs and similar, graphs, implementation	2300	x1942
1607E	Robot on the Board 1 implementation	1600	x9310
1606F	Tree Queries brute force, dp, trees	2800	x560
1606E	Arena combinatorics, dp, math	2100	x3520
1606D	Red-Blue Matrix brute force, constructive algorithms, implementation, sortings	2400	x1442
1606C	Banknotes greedy, number theory	1400	x14132
1605F	PalindORme combinatorics, dp	2900	x304
1605E	Array Equalizer binary search, greedy, implementation, math, number theory, sortings, two pointers	2400	x1044
1605D	Treelabeling bitmasks, constructive algorithms, dfs and similar, games, greedy, implementation, trees	2100	x2931
1605C	Dominant Character brute force, greedy, implementation, strings	1400	x16936
1603F	October 18, 2017 combinatorics, dp, implementation, math	2700	x280
1603E	A Perfect Problem combinatorics, dp, math	3200	x432
1603D	Artistic Partition divide and conquer, dp, number theory	3000	x673
1603C	Extreme Extension dp, greedy, math, number theory	2300	x2035
1603B	Moderate Modular Mode constructive algorithms, math, number theory	1600	x13530
1601F	Two Sorts binary search, dfs and similar, math, meet-in-the-middle	3400	x184
1601E	Phys Ed Online data structures, dp, greedy	2900	x477
1601D	Difficult Mountain data structures, dp, greedy, sortings	2700	x1452
1601C	Optimal Insertion data structures, divide and conquer, dp, greedy, sortings	2300	x2009
1601B	Frog Traveler data structures, dfs and similar, dp, graphs, shortest paths, two pointers	1900	x4950
1600J	Robot Factory bitmasks, dfs and similar	1400	x3908
1600F	Party Organization brute force, math, probabilities	2300	x488
1600E	Array Game games, greedy, two pointers	1900	x2096
1599J	Bob's Beautiful Array bitmasks, brute force, greedy	2600	x299
1599I	Desert data structures, graphs	2700	x119
1599H	Hidden Fortress interactive, math	2100	x1059
1599G	Shortest path brute force, geometry, math, shortest paths	2700	x371
1599F	Mars hashing	2700	x336
1599E	Two Arrays data structures, matrices	3200	x67
1599D	Bubble Popping	3200	x30
1599C	Bubble Strike combinatorics, math, probabilities, ternary search	2000	x1657
1599B	Restaurant Game	3100	x142
1599A	Weights constructive algorithms, greedy, two pointers	2600	x681
1598G	The Sum of Good Numbers hashing, math, string suffix structures, strings	3200	x331
1598F	RBS binary search, bitmasks, brute force, data structures, dp	2400	x1418
1598E	Staircases brute force, combinatorics, data structures, dfs and similar, dp, implementation, math	2100	x2299
1598D	Training Session combinatorics, data structures, geometry, implementation, math	1700	x8655
1594F	Ideal Farm constructive algorithms, math	2400	x1344
1594E2	Rubik's Cube Coloring (hard version) brute force, dp, implementation, math, trees	2300	x1485
1594D	The Number of Imposters constructive algorithms, dfs and similar, dp, dsu, graphs	1700	x7487
1593G	Changing Brackets constructive algorithms, data structures, dp, greedy	2200	x1690
1593F	Red-Black Number dfs and similar, dp, implementation, math, meet-in-the-middle	2100	x2438
1593E	Gardener and Tree brute force, data structures, dfs and similar, greedy, implementation, trees	1600	x12383
1593D2	Half of Same brute force, math, number theory	1900	x4984
1592F2	Alice and Recoloring 2 constructive algorithms, flows, graph matchings, greedy	2800	x723
1592F1	Alice and Recoloring 1 constructive algorithms, greedy	2600	x858
1592E	Bored Bakry bitmasks, greedy, math, two pointers	2400	x1639
1592D	Hemose in ICPC ? binary search, dfs and similar, implementation, interactive, math, number theory, trees	2300	x2230
1592C	Bakry and Partitioning bitmasks, constructive algorithms, dfs and similar, dp, graphs, trees	1700	x7974
1588F	Jumping Through the Array binary search, data structures, graphs, two pointers	3500	x284
1586I	Omkar and Mosaic combinatorics, constructive algorithms, math	3500	x192
1585G	Poachers dp, games, graphs, trees	2500	x181
1585F	Non-equal Neighbours combinatorics, dp, math	2400	x1236
1585E	Frequency Queries data structures, dfs and similar, trees	2400	x1055
1585D	Yet Another Sorting Problem data structures, math	1900	x3847
1584G	Eligible Segments geometry	3200	x209
1584F	Strange LCS bitmasks, dp, graphs, greedy, strings	2600	x965
1584E	Game with Stones binary search, data structures, games, greedy	2300	x1276
1584D	Guess the Permutation binary search, combinatorics, interactive, math	2000	x3669
1583H	Omkar and Tours data structures, divide and conquer, sortings, trees	3300	x323
1583G	Omkar and Time Travel data structures, math	3000	x453
1583F	Defender of Childhood Dreams bitmasks, constructive algorithms, divide and conquer	2500	x1299
1583E	Moment of Bloom constructive algorithms, dfs and similar, graph matchings, graphs, greedy, trees	2200	x2219
1583D	Omkar and the Meaning of Life constructive algorithms, greedy, interactive	1800	x5380
1583C	Omkar and Determination data structures, dp	1700	x6934
1582G	Kuzya and Homework data structures, number theory	2600	x594
1582F2	Korney Korneevich and XOR (hard version) binary search, brute force, dp, greedy, two pointers	2400	x1810
1582F1	Korney Korneevich and XOR (easy version) bitmasks, dp, greedy	1800	x5574
1582E	Pchelyonok and Segments binary search, data structures, dp, greedy, math	2000	x3733
1582D	Vupsen, Pupsen and 0 constructive algorithms, math	1600	x10496
1580F	Problems for Codeforces combinatorics, fft, math	3300	x133
1580E	Railway Construction brute force, constructive algorithms, data structures, graphs, shortest paths	3400	x73
1580D	Subsequence brute force, divide and conquer, dp, greedy, trees	2900	x873
1580C	Train Maintenance brute force, data structures, implementation	2200	x1794
1580B	Mathematics Curriculum brute force, combinatorics, dp, trees	2600	x1038
1580A	Portal brute force, data structures, dp, greedy, implementation	1700	x3653
1579G	Minimal Coverage dp	2200	x2375
1579F	Array Stabilization (AND version) brute force, graphs, math, number theory, shortest paths	1700	x4780
1579E2	Array Optimization by Deque data structures, greedy	1700	x6646
1579D	Productive Meeting constructive algorithms, graphs, greedy	1400	x16021