Problemset - Codeforces

→ Pay attention

Before contest
Codeforces Round 941 (Div. 1)
3 days
Register now »

*has extra registration

Before contest
Codeforces Round 941 (Div. 2)
3 days
Register now »

*has extra registration

→ Filter Problems

Difficulty: —

Add tag

Problems

#	Name
1692C	Where's the Bishop? implementation	800	x32340
1692B	All Distinct greedy, sortings	800	x32631
1692A	Marathon implementation	800	x59255
1691F	K-Set Tree combinatorics, dfs and similar, dp, math, trees	2500	x902
1691E	Number of Groups data structures, dfs and similar, dsu, graphs, greedy, sortings	2300	x1738
1691D	Max GEQ Sum binary search, constructive algorithms, data structures, divide and conquer, implementation, two pointers	1800	x5450
1691C	Sum of Substrings brute force, constructive algorithms, greedy, math, strings	1400	x15052
1691B	Shoe Shuffling constructive algorithms, greedy, implementation, two pointers	1000	x21147
1691A	Beat The Odds brute force, greedy, math	800	x29777
1690G	Count the Trains binary search, data structures, greedy, sortings	2000	x3215
1690F	Shifting String graphs, math, number theory, strings	1700	x6763
1690E	Price Maximization binary search, greedy, math, two pointers	1500	x14439
1690D	Black and White Stripe implementation, two pointers	1000	x26586
1690C	Restoring the Duration of Tasks data structures, greedy, implementation	800	x25337
1690B	Array Decrements greedy, implementation	800	x24578
1690A	Print a Pedestal (Codeforces logo?) constructive algorithms, greedy	800	x32448
1689E	ANDfinity bitmasks, brute force, constructive algorithms, dfs and similar, dsu, graphs	2500	x1145
1689D	Lena and Matrix data structures, dp, geometry, shortest paths	1900	x4016
1689C	Infected Tree dfs and similar, dp, trees	1600	x10435
1689B	Mystic Permutation data structures, greedy	900	x17071
1689A	Lex String brute force, greedy, implementation, sortings, two pointers	800	x16361
1688C	Manipulating History constructive algorithms, greedy, strings	1700	x7876
1688B	Patchouli's Magical Talisman bitmasks, constructive algorithms, greedy, sortings	800	x17832
1688A	Cirno's Perfect Bitmasks Classroom bitmasks, brute force	800	x20577
1687F	Koishi's Unconscious Permutation fft, math	3500	x77
1687E	Become Big For Me combinatorics, constructive algorithms, greedy, math, number theory	3500	x211
1687D	Cute number binary search, brute force, data structures, dsu, implementation, math	2900	x556
1687C	Sanae and Giant Robot binary search, brute force, data structures, dsu, greedy, sortings	2500	x1335
1687B	Railway System constructive algorithms, graphs, greedy, interactive, sortings	1700	x3473
1687A	The Enchanted Forest brute force, greedy	1600	x9927
1686B	Odd Subarrays dp, greedy	800	x17878
1686A	Everything Everywhere All But One greedy	800	x20153
1685E	The Ultimate LIS Problem data structures, greedy	3500	x140
1685D2	Permutation Weight (Hard Version) constructive algorithms, greedy	3500	x102
1685D1	Permutation Weight (Easy Version) constructive algorithms, dfs and similar, dsu	2800	x419
1685C	Bring Balance brute force, constructive algorithms, greedy	2600	x910
1685B	Linguistics greedy, implementation, sortings, strings	2000	x3149
1685A	Circular Local MiniMax constructive algorithms, greedy, sortings	1100	x16439
1684H	Hard Cut constructive algorithms, dfs and similar, divide and conquer, math	3400	x235
1684G	Euclid Guess constructive algorithms, flows, graph matchings, math, number theory	2800	x576
1684F	Diverse Segments data structures, two pointers	2600	x841
1684E	MEX vs DIFF binary search, brute force, constructive algorithms, data structures, greedy, two pointers	2100	x3029
1684D	Traps constructive algorithms, greedy, sortings	1700	x9281
1684C	Column Swapping brute force, constructive algorithms, greedy, implementation, sortings	1400	x11996
1684B	Z mod X = C constructive algorithms, math	800	x20580
1684A	Digit Minimization constructive algorithms, games, math, strings	800	x23444
1682F	MCMF? data structures, flows, graphs, greedy, sortings, two pointers	2700	x285
1682E	Unordered Swaps constructive algorithms, dfs and similar, graphs, greedy, math, sortings, trees	2700	x558
1682D	Circular Spanning Tree constructive algorithms, implementation, trees	2000	x3159
1682C	LIS or Reverse LIS? constructive algorithms, greedy, implementation, math	1400	x14079
1682B	AND Sorting bitmasks, constructive algorithms, sortings	1100	x17092
1682A	Palindromic Indices greedy, strings	800	x18994
1681F	Unique Occurrences data structures, dfs and similar, divide and conquer, dp, dsu, trees	2300	x1526
1681E	Labyrinth Adventures data structures, dp, matrices, shortest paths	2600	x697
1681D	Required Length brute force, dfs and similar, dp, hashing, shortest paths	1700	x9245
1681C	Double Sort implementation, sortings	1200	x16929
1681B	Card Trick implementation, math	800	x19800
1681A	Game with Cards games, greedy	800	x20703
1680F	Lenient Vertex Cover dfs and similar, divide and conquer, dsu, graphs, trees	2600	x626
1680E	Moving Chips bitmasks, dp, greedy	2000	x3619
1680D	Dog Walking brute force, greedy, math	2400	x1109
1680C	Binary String binary search, greedy, strings, two pointers	1600	x9457
1680B	Robots implementation	800	x18045
1680A	Minimums and Maximums brute force, math	800	x20987
1679F	Formalism for Formalism bitmasks, dp, math	2600	x494
1679E	Typical Party in Dorm bitmasks, combinatorics, dp, strings	2400	x1092
1679D	Toss a Coin to Your Graph... binary search, dfs and similar, dp, graphs	1900	x4552
1679C	Rooks Defenders data structures, implementation	1400	x9849
1679B	Stone Age Problem data structures, implementation	1200	x16863
1679A	AvtoBus brute force, greedy, math, number theory	900	x21705
1678B2	Tokitsukaze and Good 01-String (hard version) dp, greedy, implementation	1800	x6378
1678B1	Tokitsukaze and Good 01-String (easy version) implementation	800	x15666
1678A	Tokitsukaze and All Zero Sequence implementation	800	x17901
1677F	Tokitsukaze and Gems dp, math	3500	x85
1677E	Tokitsukaze and Beautiful Subsegments data structures	2900	x504
1677D	Tokitsukaze and Permutations dp, math	2500	x1189
1677C	Tokitsukaze and Two Colorful Tapes constructive algorithms, dfs and similar, graphs, greedy	1900	x3387
1677B	Tokitsukaze and Meeting data structures, implementation, math	1700	x4008
1677A	Tokitsukaze and Strange Inequality brute force, data structures, dp	1600	x8094
1676H2	Maximum Crossings (Hard Version) data structures, divide and conquer, sortings	1500	x9971
1676H1	Maximum Crossings (Easy Version) brute force	1400	x13204
1676G	White-Black Balanced Subtrees dfs and similar, dp, graphs, trees	1300	x14067
1676F	Longest Strike data structures, greedy, implementation, sortings, two pointers	1300	x15728
1676E	Eating Queries binary search, greedy, sortings	1100	x24482
1676D	X-Sum brute force, greedy, implementation	1000	x23887
1676C	Most Similar Words brute force, greedy, implementation, implementation, math, strings	800	x28663
1676B	Equal Candies greedy, math, sortings	800	x44841
1676A	Lucky? implementation	800	x57565
1675G	Sorting Pancakes dp	2300	x1595
1675F	Vlad and Unfinished Business dfs and similar, dp, greedy, trees	1800	x4988
1675E	Replace With the Previous, Minimize dsu, greedy, strings	1500	x10057
1675D	Vertical Paths graphs, implementation, trees	1300	x12514
1675C	Detective Task implementation	1100	x17689
1675B	Make It Increasing greedy, implementation	900	x24524
1675A	Food for Animals greedy, math	800	x31390
1674G	Remove Directed Edges dfs and similar, dp, graphs	2000	x2376
1674F	Desktop Rearrangement data structures, greedy, implementation	1800	x4851
1674E	Breaking the Wall binary search, brute force, constructive algorithms, greedy, math	2000	x6138
1674D	A-B-C Sort constructive algorithms, implementation, sortings	1200	x15731
1674C	Infinite Replacement combinatorics, implementation, strings	1000	x22844