Problemset - Codeforces

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

→ Pay attention

Before contest
Codeforces Round (Div. 2)
7 days

→ Filter Problems

Difficulty: —

Add tag

Problems

#	Name
1774F1	Magician and Pigs (Easy Version) brute force, data structures, implementation	2400	x1079
1774E	Two Chess Pieces dfs and similar, dp, greedy, trees	1900	x3482
1774D	Same Count One brute force, constructive algorithms, greedy, implementation, two pointers	1600	x7864
1774C	Ice and Fire constructive algorithms, dp, greedy	1300	x12011
1774B	Coloring constructive algorithms, greedy, math	1500	x12263
1774A	Add Plus Minus Sign constructive algorithms, math	800	x22403
1773L	Lisa's Sequences dp	3500	x43
1773K	King's Puzzle constructive algorithms	1900	x1414
1773J	Jumbled Trees constructive algorithms, math	2900	x108
1773I	Interactive Factorial Guessing brute force, games, implementation, interactive	2500	x480
1773H	Hot and Cold binary search, interactive	2600	x359
1773G	Game of Questions bitmasks, combinatorics, dp, fft, math, probabilities	2800	x366
1773F	Football constructive algorithms	800	x4113
1773E	Easy Assembly greedy, sortings	1400	x4876
1773D	Dominoes combinatorics, flows, graph matchings, greedy	2600	x467
1773C	Cactus Meets Torus	3500	x30
1773B	BinCoin binary search, divide and conquer, hashing, implementation, probabilities, trees	2200	x770
1773A	Amazing Trick constructive algorithms, graph matchings, math, probabilities	1900	x1537
1772G	Gaining Rating binary search, greedy, implementation, math, sortings, two pointers	2200	x1350
1772F	Copy of a Copy of a Copy constructive algorithms, dfs and similar, graphs, implementation, sortings	2000	x2365
1772E	Permutation Game games	1700	x6768
1772D	Absolute Sorting constructive algorithms, math	1400	x15905
1772C	Different Differences constructive algorithms, greedy, math	1000	x23712
1772B	Matrix Rotation brute force, implementation	800	x29223
1772A	A+B? implementation	800	x47640
1771F	Hossam and Range Minimum Query binary search, bitmasks, data structures, hashing, probabilities, strings, trees	2500	x1142
1771E	Hossam and a Letter brute force, dp, implementation, two pointers	2500	x702
1771D	Hossam and (sub-)palindromic tree brute force, data structures, dfs and similar, dp, strings, trees	2100	x2764
1771C	Hossam and Trainees greedy, math, number theory	1600	x9696
1771B	Hossam and Friends binary search, constructive algorithms, dp, two pointers	1400	x14393
1771A	Hossam and Combinatorics combinatorics, math, sortings	900	x22907
1770H	Koxia, Mahiru and Winter Festival constructive algorithms	3500	x104
1770G	Koxia and Bracket divide and conquer, fft, math	3400	x158
1770F	Koxia and Sequence bitmasks, combinatorics, dp, math, number theory	3100	x668
1770E	Koxia and Tree combinatorics, dfs and similar, dp, dsu, math, probabilities, trees	2400	x1354
1770D	Koxia and Game constructive algorithms, data structures, dfs and similar, dsu, flows, games, graph matchings, graphs, implementation	2000	x3846
1770C	Koxia and Number Theory brute force, chinese remainder theorem, math, number theory	1700	x8535
1770B	Koxia and Permutation constructive algorithms	1000	x19401
1770A	Koxia and Whiteboards brute force, greedy	1000	x23507
1769D3	Игра в Девятку III *special problem, brute force	2300	x119
1769D2	Игра в Девятку II *special problem, brute force	2200	x197
1769D1	Игра в Девятку I *special problem, brute force, dp	1800	x383
1769C2	Подкрутка II *special problem, dp	1300	x969
1769C1	Подкрутка I *special problem, brute force, dp, greedy	1200	x970
1769B2	Копирование файлов II *special problem, binary search, brute force, math	1400	x877
1769B1	Копирование файлов I *special problem, brute force, implementation, math	1000	x1359
1769A	Узкая дорога *special problem, math	800	x1956
1768F	Wonderful Jump dp, greedy	2900	x842
1768E	Partial Sorting combinatorics, math, number theory	2300	x1881
1768D	Lucky Permutation constructive algorithms, dfs and similar, graphs, greedy	1800	x7154
1768C	Elemental Decompress constructive algorithms, greedy, implementation, sortings	1300	x14189
1768B	Quick Sort greedy, math	900	x23092
1768A	Greatest Convex greedy, math, number theory	800	x28919
1767F	Two Subtrees data structures, trees	3100	x276
1767E	Algebra Flash bitmasks, brute force, dp, graphs, math, meet-in-the-middle, trees	2500	x928
1767D	Playoff combinatorics, constructive algorithms, dp, greedy, math	1500	x9887
1767C	Count Binary Strings data structures, dp	2100	x2649
1767B	Block Towers data structures, greedy, sortings	800	x20355
1767A	Cut the Triangle implementation	800	x20545
1766F	MCF flows	2800	x268
1766E	Decomposition binary search, brute force, data structures, divide and conquer, dp, two pointers	2300	x1195
1766D	Lucky Chains math, number theory	1600	x8908
1766C	Hamiltonian Wall dp, implementation	1300	x13654
1766B	Notepad# implementation	1000	x21117
1766A	Extremely Round brute force, implementation	800	x26628
1765N	Number Reduction greedy	1500	x4774
1765M	Minimum LCM math, number theory	1000	x15535
1765L	Project Manager brute force, data structures, implementation	2400	x583
1765K	Torus Path greedy, math	1500	x5796
1765J	Hero to Zero graph matchings, math	2900	x197
1765I	Infinite Chess implementation, shortest paths	2800	x188
1765H	Hospital Queue binary search, graphs, greedy, implementation	2200	x1264
1765G	Guess the String constructive algorithms, interactive, probabilities	2600	x388
1765F	Chemistry Lab dp, geometry, probabilities	2200	x600
1765E	Exchange brute force, math	1000	x10063
1765D	Watch the Videos binary search, constructive algorithms, two pointers	1700	x4156
1765C	Card Guessing combinatorics, dp, probabilities	2600	x387
1765B	Broken Keyboard greedy	800	x9015
1765A	Access Levels bitmasks, dsu, flows, graph matchings	2400	x697
1764H	Doremy's Paint 2 data structures	3400	x191
1764G3	Doremy's Perfect DS Class (Hard Version) binary search, interactive	3300	x462
1764G2	Doremy's Perfect DS Class (Medium Version) binary search, interactive	3000	x530
1764G1	Doremy's Perfect DS Class (Easy Version) binary search, interactive	2900	x589
1764F	Doremy's Experimental Tree brute force, constructive algorithms, dfs and similar, dsu, sortings, trees	2500	x961
1764E	Doremy's Number Line dp, greedy, sortings	2400	x1231
1764D	Doremy's Pegging Game combinatorics, dp, math	2000	x2765
1764C	Doremy's City Construction graphs, greedy	1400	x9402
1764B	Doremy's Perfect Math Class math, number theory	900	x15856
1764A	Doremy's Paint greedy	800	x16592
1763F	Edge Queries data structures, dfs and similar, dp, dsu, graphs, trees	3000	x477
1763E	Node Pairs dp, graphs, math, number theory	2200	x1798
1763D	Valid Bitonic Permutations combinatorics, dp, implementation, math, number theory	2200	x2053
1763C	Another Array Problem brute force, constructive algorithms, greedy	2000	x6554
1763B	Incinerate binary search, brute force, data structures, implementation, math, sortings	1200	x14613
1763A	Absolute Maximization bitmasks, constructive algorithms, greedy, math	800	x15675
1762G	Unequal Adjacent Elements constructive algorithms, sortings	3100	x102
1762F	Good Pairs binary search, data structures, dp	2600	x651
1762E	Tree Sum combinatorics, math, trees	2600	x660
1762D	GCD Queries constructive algorithms, interactive, number theory	2100	x3599
1762C	Binary Strings are Fun combinatorics, math	1400	x9175