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
04:20:34
Register now »

*has extra registration

→ Filter Problems

Difficulty: —

Add tag

Problems

#	Name
1701D	Permutation Restoration binary search, data structures, greedy, math, sortings, two pointers	1900	x5673
1701C	Schedule Management binary search, greedy, implementation, two pointers	1400	x16968
1700F	Puzzle constructive algorithms, dp, greedy	2600	x934
1700E	Serega the Pirate brute force, constructive algorithms	2600	x851
1700D	River Locks binary search, dp, greedy, math	1900	x6084
1700C	Helping the Nature constructive algorithms, data structures, greedy	1700	x10898
1699E	Three Days Grace data structures, dp, greedy, math, number theory, two pointers	2600	x1142
1699D	Almost Triple Deletions data structures, dp, greedy	2300	x3142
1699C	The Third Problem combinatorics, constructive algorithms, math	1700	x9750
1698G	Long Binary String bitmasks, math, matrices, meet-in-the-middle, number theory	2900	x315
1698F	Equal Reversal constructive algorithms, graphs, implementation, math	2800	x623
1698E	PermutationForces II brute force, combinatorics, greedy, sortings, trees, two pointers	2300	x1639
1698D	Fixed Point Guessing binary search, constructive algorithms, interactive	1600	x9277
1697F	Too Many Constraints 2-sat, constructive algorithms, graphs, implementation	2800	x559
1697E	Coloring brute force, combinatorics, constructive algorithms, dp, geometry, graphs, greedy, implementation, math	2400	x1196
1697D	Guess The String binary search, constructive algorithms, interactive	1900	x4430
1697C	awoo's Favorite Problem binary search, constructive algorithms, data structures, greedy, implementation, strings, two pointers	1400	x14343
1696H	Maximum Product? brute force, combinatorics, dp, greedy, implementation, math, two pointers	3500	x161
1696G	Fishingprince Plays With Array Again brute force, data structures, geometry, math	3300	x275
1696F	Tree Recovery brute force, constructive algorithms, dfs and similar, dsu, graphs, trees	2600	x881
1696E	Placing Jinas combinatorics, math	2000	x4036
1696D	Permutation Graph binary search, constructive algorithms, data structures, divide and conquer, greedy, shortest paths	1900	x5449
1696C	Fishingprince Plays With Array constructive algorithms, greedy, implementation, math	1400	x11611
1695E	Ambiguous Dominoes constructive algorithms, dfs and similar, graphs	2700	x448
1695D2	Tree Queries (Hard Version) constructive algorithms, dfs and similar, dp, greedy, trees	2300	x1994
1695D1	Tree Queries (Easy Version) brute force, constructive algorithms, dfs and similar, dp, greedy, trees	2200	x2171
1695C	Zero Path brute force, data structures, dp, graphs, greedy, shortest paths	1700	x10910
1693F	I Might Be Wrong binary search, greedy, two pointers	3400	x405
1693E	Outermost Maximums data structures, greedy	3400	x422
1693D	Decinc Dividing brute force, data structures, divide and conquer, dp, greedy	2800	x836
1693C	Keshi in Search of AmShZ graphs, greedy, shortest paths	2300	x2576
1693B	Fake Plastic Trees dfs and similar, dp, greedy, trees	1700	x8445
1692H	Gambling data structures, dp, greedy, math	1700	x7448
1692G	2^Sort data structures, dp, sortings, two pointers	1400	x17654
1691F	K-Set Tree combinatorics, dfs and similar, dp, math, trees	2500	x971
1691E	Number of Groups data structures, dfs and similar, dsu, graphs, greedy, sortings	2300	x1829
1691D	Max GEQ Sum binary search, constructive algorithms, data structures, divide and conquer, implementation, two pointers	1800	x5786
1691C	Sum of Substrings brute force, constructive algorithms, greedy, math, strings	1400	x15632
1690G	Count the Trains binary search, data structures, greedy, sortings	2000	x3385
1690F	Shifting String graphs, math, number theory, strings	1700	x7151
1690E	Price Maximization binary search, greedy, math, two pointers	1500	x15160
1689E	ANDfinity bitmasks, brute force, constructive algorithms, dfs and similar, dsu, graphs	2500	x1210
1689D	Lena and Matrix data structures, dp, geometry, shortest paths	1900	x4206
1689C	Infected Tree dfs and similar, dp, trees	1600	x11202
1688C	Manipulating History constructive algorithms, greedy, strings	1700	x8140
1687F	Koishi's Unconscious Permutation fft, math	3500	x84
1687E	Become Big For Me combinatorics, constructive algorithms, greedy, math, number theory	3500	x224
1687D	Cute number binary search, brute force, data structures, dsu, implementation, math	2900	x588
1687C	Sanae and Giant Robot binary search, brute force, data structures, dsu, greedy, sortings	2500	x1406
1687B	Railway System constructive algorithms, graphs, greedy, interactive, sortings	1700	x3637
1687A	The Enchanted Forest brute force, greedy	1600	x10361
1685E	The Ultimate LIS Problem data structures, greedy	3500	x150
1685D2	Permutation Weight (Hard Version) constructive algorithms, greedy	3500	x107
1685D1	Permutation Weight (Easy Version) constructive algorithms, dfs and similar, dsu	2800	x444
1685C	Bring Balance brute force, constructive algorithms, greedy	2600	x1010
1685B	Linguistics greedy, implementation, sortings, strings	2000	x3267
1684H	Hard Cut constructive algorithms, dfs and similar, divide and conquer, math	3400	x239
1684G	Euclid Guess constructive algorithms, flows, graph matchings, math, number theory	2800	x610
1684F	Diverse Segments data structures, two pointers	2600	x896
1684E	MEX vs DIFF binary search, brute force, constructive algorithms, data structures, greedy, two pointers	2100	x3156
1684D	Traps constructive algorithms, greedy, sortings	1700	x9651
1684C	Column Swapping brute force, constructive algorithms, greedy, implementation, sortings	1400	x12307
1682F	MCMF? data structures, flows, graphs, greedy, sortings, two pointers	2700	x313
1682E	Unordered Swaps constructive algorithms, dfs and similar, graphs, greedy, math, sortings, trees	2700	x599
1682D	Circular Spanning Tree constructive algorithms, implementation, trees	2000	x3301
1682C	LIS or Reverse LIS? constructive algorithms, greedy, implementation, math	1400	x14716
1681F	Unique Occurrences data structures, dfs and similar, divide and conquer, dp, dsu, trees	2300	x1756
1681E	Labyrinth Adventures data structures, dp, matrices, shortest paths	2600	x795
1681D	Required Length brute force, dfs and similar, dp, hashing, shortest paths	1700	x9610
1680F	Lenient Vertex Cover dfs and similar, divide and conquer, dsu, graphs, trees	2600	x664
1680E	Moving Chips bitmasks, dp, greedy	2000	x3787
1680D	Dog Walking brute force, greedy, math	2400	x1165
1680C	Binary String binary search, greedy, strings, two pointers	1600	x9911
1679F	Formalism for Formalism bitmasks, dp, math	2600	x537
1679E	Typical Party in Dorm bitmasks, combinatorics, dp, strings	2400	x1169
1679D	Toss a Coin to Your Graph... binary search, dfs and similar, dp, graphs	1900	x4818
1679C	Rooks Defenders data structures, implementation	1400	x10285
1678B2	Tokitsukaze and Good 01-String (hard version) dp, greedy, implementation	1800	x6605
1677F	Tokitsukaze and Gems dp, math	3500	x93
1677E	Tokitsukaze and Beautiful Subsegments data structures	2900	x549
1677D	Tokitsukaze and Permutations dp, math	2500	x1257
1677C	Tokitsukaze and Two Colorful Tapes constructive algorithms, dfs and similar, graphs, greedy	1900	x3565
1677B	Tokitsukaze and Meeting data structures, implementation, math	1700	x4172
1677A	Tokitsukaze and Strange Inequality brute force, data structures, dp	1600	x8421
1676H2	Maximum Crossings (Hard Version) data structures, divide and conquer, sortings	1500	x10719
1676H1	Maximum Crossings (Easy Version) brute force	1400	x14000
1675G	Sorting Pancakes dp	2300	x1769
1675F	Vlad and Unfinished Business dfs and similar, dp, greedy, trees	1800	x5311
1675E	Replace With the Previous, Minimize dsu, greedy, strings	1500	x10604
1674G	Remove Directed Edges dfs and similar, dp, graphs	2000	x2493
1674F	Desktop Rearrangement data structures, greedy, implementation	1800	x5040
1674E	Breaking the Wall binary search, brute force, constructive algorithms, greedy, math	2000	x6403
1673F	Anti-Theft Road Planning bitmasks, constructive algorithms, divide and conquer, greedy, interactive, math	2400	x822
1673E	Power or XOR? bitmasks, combinatorics, math, number theory	2500	x707
1673D	Lost Arithmetic Progression combinatorics, math, number theory	1900	x3307
1673C	Palindrome Basis brute force, dp, math, number theory	1500	x12708
1672I	PermutationForces data structures, greedy	3000	x172
1672H	Zigu Zagu constructive algorithms, data structures, greedy	2700	x947
1672G	Cross Xor constructive algorithms, graphs, math, matrices	3200	x321
1672F2	Checker for Array Shuffling constructive algorithms, dfs and similar, graphs	2800	x804