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
1781C	Equal Frequencies brute force, constructive algorithms, greedy, implementation, sortings, strings	1600	x7601
1781B	Going to the Cinema brute force, greedy, sortings	1000	x13524
1781A	Parallel Projection geometry, math	800	x15070
1780G	Delicious Dessert binary search, dsu, hashing, math, number theory, string suffix structures	2400	x733
1780F	Three Chairs bitmasks, brute force, combinatorics, data structures, dp, number theory, sortings	2300	x1478
1780E	Josuke and Complete Graph binary search, brute force, data structures, math, number theory	2400	x1437
1780D	Bit Guessing Game binary search, bitmasks, constructive algorithms, interactive	1800	x4948
1780B	GCD Partition brute force, greedy, math, number theory	1100	x18101
1780A	Hayato and School constructive algorithms, greedy	800	x21695
1779H	Olympic Team Building brute force, meet-in-the-middle	3500	x142
1779G	The Game of the Century constructive algorithms, graphs, shortest paths	3000	x320
1779F	Xorcerer's Stones bitmasks, constructive algorithms, dp, trees	2500	x1260
1779E	Anya's Simultaneous Exhibition constructive algorithms, graphs, greedy, interactive, sortings	2400	x1760
1779D	Boris and His Amazing Haircut constructive algorithms, data structures, dp, dsu, greedy, sortings	1700	x7918
1779C	Least Prefix Sum data structures, greedy	1600	x12389
1779B	MKnez's ConstructiveForces Task constructive algorithms, math	900	x23601
1779A	Hall of Fame constructive algorithms, greedy, strings	800	x23152
1778F	Maximizing Root dfs and similar, dp, graphs, math, number theory, trees	2600	x660
1778E	The Tree Has Fallen! bitmasks, dfs and similar, math, trees	2500	x878
1778D	Flexible String Revisit combinatorics, dp, math, probabilities	2100	x2769
1778C	Flexible String bitmasks, brute force, strings	1600	x8226
1778B	The Forbidden Permutation greedy, math	1300	x13301
1778A	Flip Flop Sum greedy, implementation	800	x24331
1777F	Comfortably Numb bitmasks, data structures, divide and conquer, strings, trees	2400	x937
1777E	Edge Reverse binary search, dfs and similar, graphs, trees	2200	x1856
1777D	Score of a Tree bitmasks, combinatorics, dfs and similar, dp, math, probabilities, trees	1900	x3485
1777C	Quiz Master binary search, math, number theory, sortings, two pointers	1700	x8547
1777B	Emordnilap combinatorics, greedy, math	900	x17498
1777A	Everybody Likes Good Arrays! greedy, math	800	x24416
1776N	Count Permutations math	3500	x82
1776M	Parmigiana With Seafood binary search, dp, greedy, trees	3000	x372
1776L	Controllers binary search, math	1500	x6029
1776K	Uniform Chemistry dp, math	3200	x68
1776J	Italian Data Centers graphs, shortest paths	2500	x681
1776I	Spinach Pizza games, geometry, greedy, interactive	2500	x676
1776H	Beppa and SwerChat two pointers	1300	x6401
1776G	Another Wine Tasting Event combinatorics, constructive algorithms, math, strings	2100	x2048
1776F	Train Splitting constructive algorithms, graphs, greedy	1700	x3453
1776E	Crossing the Railways data structures, dp	3500	x70
1776D	Teamwork constructive algorithms, greedy, math	2800	x363
1776C	Library game games, greedy, interactive, sortings	2500	x798
1776B	Vittorio Plays with LEGO Bricks dp, geometry	2200	x1325
1776A	Walking Boy greedy	800	x6979
1775F	Laboratory on Pluto constructive algorithms, dp, greedy, math	2500	x763
1775E	The Human Equation greedy, implementation	2100	x3202
1775D	Friendly Spiders dfs and similar, graphs, math, number theory, shortest paths	1800	x6273
1775C	Interesting Sequence bitmasks, math	1600	x10461
1775B	Gardener and the Array bitmasks, constructive algorithms	1300	x13894
1775A2	Gardener and the Capybaras (hard version) constructive algorithms, greedy	900	x18737
1775A1	Gardener and the Capybaras (easy version) brute force, constructive algorithms, implementation	800	x19651
1774H	Maximum Permutation constructive algorithms	3500	x134
1774G	Segment Covering brute force, combinatorics, constructive algorithms, data structures, dp, trees	3200	x438
1774F2	Magician and Pigs (Hard Version) binary search, brute force, data structures, implementation	2700	x680
1774F1	Magician and Pigs (Easy Version) brute force, data structures, implementation	2400	x1079
1774E	Two Chess Pieces dfs and similar, dp, greedy, trees	1900	x3481
1774D	Same Count One brute force, constructive algorithms, greedy, implementation, two pointers	1600	x7863
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	x6767
1772D	Absolute Sorting constructive algorithms, math	1400	x15904
1772C	Different Differences constructive algorithms, greedy, math	1000	x23707
1772B	Matrix Rotation brute force, implementation	800	x29219
1772A	A+B? implementation	800	x47632
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	x9693
1771B	Hossam and Friends binary search, constructive algorithms, dp, two pointers	1400	x14389
1771A	Hossam and Combinatorics combinatorics, math, sortings	900	x22905
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	x667
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	x8534
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