Problemset - Codeforces

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

→ Pay attention

Before contest
Kotlin Heroes: Episode 11
9 days
Register now »

→ Filter Problems

Difficulty: —

Add tag

Problems

#	Name
1770E	Koxia and Tree combinatorics, dfs and similar, dp, dsu, math, probabilities, trees	2400	x1348
1770D	Koxia and Game constructive algorithms, data structures, dfs and similar, dsu, flows, games, graph matchings, graphs, implementation	2000	x3822
1770C	Koxia and Number Theory brute force, chinese remainder theorem, math, number theory	1700	x8511
1770B	Koxia and Permutation constructive algorithms	1000	x19365
1770A	Koxia and Whiteboards brute force, greedy	1000	x23445
1769D3	Игра в Девятку III *special problem, brute force	2300	x119
1769D2	Игра в Девятку II *special problem, brute force	2200	x191
1769D1	Игра в Девятку I *special problem, brute force, dp	1800	x377
1769C2	Подкрутка II *special problem, dp	1300	x957
1769C1	Подкрутка I *special problem, brute force, dp, greedy	1200	x962
1769B2	Копирование файлов II *special problem, binary search, brute force, math	1400	x870
1769B1	Копирование файлов I *special problem, brute force, implementation, math	1000	x1347
1769A	Узкая дорога *special problem, math	800	x1946
1768F	Wonderful Jump dp, greedy	2900	x833
1768E	Partial Sorting combinatorics, math, number theory	2300	x1867
1768D	Lucky Permutation constructive algorithms, dfs and similar, graphs, greedy	1800	x7120
1768C	Elemental Decompress constructive algorithms, greedy, implementation, sortings	1300	x14149
1768B	Quick Sort greedy, math	900	x23013
1768A	Greatest Convex greedy, math, number theory	800	x28827
1767F	Two Subtrees data structures, trees	3100	x274
1767E	Algebra Flash bitmasks, brute force, dp, graphs, math, meet-in-the-middle, trees	2500	x917
1767D	Playoff combinatorics, constructive algorithms, dp, greedy, math	1500	x9852
1767C	Count Binary Strings data structures, dp	2100	x2632
1767B	Block Towers data structures, greedy, sortings	800	x20293
1767A	Cut the Triangle implementation	800	x20521
1766F	MCF flows	2800	x268
1766E	Decomposition binary search, brute force, data structures, divide and conquer, dp, two pointers	2300	x1181
1766D	Lucky Chains math, number theory	1600	x8856
1766C	Hamiltonian Wall dp, implementation	1300	x13588
1766B	Notepad# implementation	1000	x21007
1766A	Extremely Round brute force, implementation	800	x26354
1765N	Number Reduction greedy	1500	x4732
1765M	Minimum LCM math, number theory	1000	x15217
1765L	Project Manager brute force, data structures, implementation	2400	x582
1765K	Torus Path greedy, math	1500	x5769
1765J	Hero to Zero graph matchings, math	2900	x195
1765I	Infinite Chess implementation, shortest paths	2800	x188
1765H	Hospital Queue binary search, graphs, greedy, implementation	2200	x1251
1765G	Guess the String constructive algorithms, interactive, probabilities	2600	x384
1765F	Chemistry Lab dp, geometry, probabilities	2200	x596
1765E	Exchange brute force, math	1000	x10014
1765D	Watch the Videos binary search, constructive algorithms, two pointers	1700	x4131
1765C	Card Guessing combinatorics, dp, probabilities	2600	x383
1765B	Broken Keyboard greedy	800	x8962
1765A	Access Levels bitmasks, dsu, flows, graph matchings	2400	x695
1764H	Doremy's Paint 2 data structures	3400	x190
1764G3	Doremy's Perfect DS Class (Hard Version) binary search, interactive	3300	x457
1764G2	Doremy's Perfect DS Class (Medium Version) binary search, interactive	3000	x526
1764G1	Doremy's Perfect DS Class (Easy Version) binary search, interactive	2900	x583
1764F	Doremy's Experimental Tree brute force, constructive algorithms, dfs and similar, dsu, sortings, trees	2500	x958
1764E	Doremy's Number Line dp, greedy, sortings	2400	x1223
1764D	Doremy's Pegging Game combinatorics, dp, math	2000	x2758
1764C	Doremy's City Construction graphs, greedy	1400	x9372
1764B	Doremy's Perfect Math Class math, number theory	900	x15819
1764A	Doremy's Paint greedy	800	x16576
1763F	Edge Queries data structures, dfs and similar, dp, dsu, graphs, trees	3000	x476
1763E	Node Pairs dp, graphs, math, number theory	2200	x1789
1763D	Valid Bitonic Permutations combinatorics, dp, implementation, math, number theory	2200	x2046
1763C	Another Array Problem brute force, constructive algorithms, greedy	2000	x6534
1763B	Incinerate binary search, brute force, data structures, implementation, math, sortings	1200	x14559
1763A	Absolute Maximization bitmasks, constructive algorithms, greedy, math	800	x15650
1762G	Unequal Adjacent Elements constructive algorithms, sortings	3100	x102
1762F	Good Pairs binary search, data structures, dp	2600	x609
1762E	Tree Sum combinatorics, math, trees	2600	x642
1762D	GCD Queries constructive algorithms, interactive, number theory	2100	x3489
1762C	Binary Strings are Fun combinatorics, math	1400	x9145
1762B	Make Array Good constructive algorithms, implementation, number theory, sortings	1100	x16896
1762A	Divide and Conquer greedy, math, number theory	800	x19014
1761G	Centroid Guess interactive, probabilities, trees	3500	x110
1761F2	Anti-median (Hard Version) combinatorics, dp, math	3500	x81
1761F1	Anti-median (Easy Version) dp, math	3100	x205
1761E	Make It Connected binary search, brute force, constructive algorithms, dsu, graphs, greedy, matrices, trees, two pointers	2400	x1828
1761D	Carry Bit combinatorics, math	2100	x2442
1761C	Set Construction constructive algorithms, dfs and similar, graphs, greedy	1400	x9549
1761B	Elimination of a Ring constructive algorithms, greedy, implementation	1000	x13409
1761A	Two Permutations brute force, constructive algorithms	800	x19473
1760G	SlavicG's Favorite Problem bitmasks, dfs and similar, graphs	1700	x7317
1760F	Quests binary search, greedy, sortings	1500	x12112
1760E	Binary Inversions data structures, greedy, math	1100	x20210
1760D	Challenging Valleys implementation, two pointers	1000	x23560
1760C	Advantage data structures, implementation, sortings	800	x36868
1760B	Atilla's Favorite Problem greedy, implementation, strings	800	x44218
1760A	Medium Number implementation, sortings	800	x58606
1759G	Restore the Permutation binary search, constructive algorithms, data structures, greedy, math	1900	x4457
1759F	All Possible Digits binary search, data structures, greedy, math, number theory	1800	x3901
1759E	The Humanoid brute force, dp, sortings	1500	x10737
1759D	Make It Round brute force, number theory	1400	x13465
1759C	Thermostat greedy, math, shortest paths	1100	x17572
1759B	Lost Permutation math	800	x22180
1759A	Yes-Yes? implementation, strings	800	x29862
1758F	Decent Division constructive algorithms, data structures	3000	x170
1758E	Tick, Tock combinatorics, dfs and similar, dsu, graphs	2500	x837
1758D	Range = √Sum binary search, brute force, constructive algorithms, math, two pointers	1800	x7267
1758C	Almost All Multiples greedy, number theory	1400	x13563
1758B	XOR = Average constructive algorithms	900	x21195
1758A	SSeeeeiinngg DDoouubbllee constructive algorithms, strings	800	x25129
1754B	Kevin and Permutation constructive algorithms, greedy, math	800	x18870
1754A	Technical Support greedy	800	x23069
1753F	Minecraft Series brute force, two pointers	3500	x205
1753E	N Machines binary search, brute force, greedy	3300	x332