Problemset - Codeforces

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

→ Pay attention

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

*has extra registration

→ Filter Problems

Difficulty: —

Add tag

Problems

#	Name
1761B	Elimination of a Ring constructive algorithms, greedy, implementation	1000	x13434
1761A	Two Permutations brute force, constructive algorithms	800	x19616
1760G	SlavicG's Favorite Problem bitmasks, dfs and similar, graphs	1700	x7334
1760F	Quests binary search, greedy, sortings	1500	x12182
1760E	Binary Inversions data structures, greedy, math	1100	x20267
1760D	Challenging Valleys implementation, two pointers	1000	x23622
1760C	Advantage data structures, implementation, sortings	800	x36989
1760B	Atilla's Favorite Problem greedy, implementation, strings	800	x44403
1760A	Medium Number implementation, sortings	800	x58920
1759G	Restore the Permutation binary search, constructive algorithms, data structures, greedy, math	1900	x4473
1759F	All Possible Digits binary search, data structures, greedy, math, number theory	1800	x3911
1759E	The Humanoid brute force, dp, sortings	1500	x10776
1759D	Make It Round brute force, number theory	1400	x13552
1759C	Thermostat greedy, math, shortest paths	1100	x17611
1759B	Lost Permutation math	800	x22216
1759A	Yes-Yes? implementation, strings	800	x29937
1758F	Decent Division constructive algorithms, data structures	3000	x171
1758E	Tick, Tock combinatorics, dfs and similar, dsu, graphs	2500	x842
1758D	Range = √Sum binary search, brute force, constructive algorithms, math, two pointers	1800	x7294
1758C	Almost All Multiples greedy, number theory	1400	x13611
1758B	XOR = Average constructive algorithms	900	x21245
1758A	SSeeeeiinngg DDoouubbllee constructive algorithms, strings	800	x25168
1754B	Kevin and Permutation constructive algorithms, greedy, math	800	x18888
1754A	Technical Support greedy	800	x23194
1753F	Minecraft Series brute force, two pointers	3500	x205
1753E	N Machines binary search, brute force, greedy	3300	x332
1753D	The Beach constructive algorithms, dfs and similar, graphs, shortest paths	2400	x1754
1753C	Wish I Knew How to Sort dp, math, probabilities	2000	x4452
1753B	Factorial Divisibility math, number theory	1600	x12734
1753A2	Make Nonzero Sum (hard version) constructive algorithms, dp, greedy	1500	x10307
1753A1	Make Nonzero Sum (easy version) constructive algorithms, dp, greedy	1300	x14901
1750H	BinaryStringForces constructive algorithms, data structures, dp	3500	x82
1750G	Doping combinatorics, dp, math	3300	x248
1750F	Majority combinatorics, dp, math, strings	2700	x912
1750E	Bracket Cost binary search, data structures, divide and conquer, dp, greedy, strings	2400	x1416
1750D	Count GCD combinatorics, math, number theory	1800	x5866
1750C	Complementary XOR constructive algorithms, implementation	1400	x9543
1750B	Maximum Substring brute force, greedy, implementation	800	x16229
1750A	Indirect Sort constructive algorithms, implementation, math	800	x17054
1749F	Distance to the Path data structures, dfs and similar, trees	2800	x511
1749E	Cactus Wall constructive algorithms, dfs and similar, graphs, shortest paths	2400	x1700
1749D	Counting Arrays combinatorics, dp, math, number theory	1900	x5574
1749C	Number Game binary search, data structures, games, greedy, implementation	1400	x13917
1749B	Death's Blessing greedy	900	x20987
1749A	Cowardly Rooks greedy, implementation	800	x22334
1748F	Circular Xor Reversal bitmasks, constructive algorithms	3000	x335
1748E	Yet Another Array Counting Problem binary search, data structures, divide and conquer, dp, flows, math, trees	2300	x1909
1748D	ConstructOR bitmasks, chinese remainder theorem, combinatorics, constructive algorithms, math, number theory	2100	x2799
1748C	Zero-Sum Prefixes brute force, data structures, dp, greedy, implementation	1600	x11087
1748B	Diverse Substrings brute force, implementation, strings	1400	x15013
1748A	The Ultimate Square math	800	x24051
1747E	List Generation combinatorics, dp, math	2900	x510
1747D	Yet Another Problem binary search, bitmasks, constructive algorithms, data structures	1900	x4650
1747C	Swap Game games	1200	x21199
1747B	BAN BAN constructive algorithms	900	x22940
1747A	Two Groups constructive algorithms, greedy	800	x24845
1746G	Olympiad Training binary search, data structures, dp, flows, geometry, implementation, sortings	3500	x96
1746F	Kazaee data structures, hashing, probabilities	2800	x1726
1746E2	Joking (Hard Version) dp, interactive	3200	x395
1746E1	Joking (Easy Version) binary search, constructive algorithms, interactive, ternary search	2500	x1435
1746D	Paths on the Tree dfs and similar, dp, greedy, sortings, trees	1900	x4605
1746C	Permutation Operations constructive algorithms, greedy, implementation, math	1300	x12795
1746B	Rebellion constructive algorithms, greedy, two pointers	800	x17145
1746A	Maxmina constructive algorithms, greedy	800	x19812
1744F	MEX vs MED math, two pointers	2000	x3082
1744E2	Divisible Numbers (hard version) brute force, math, number theory	1900	x5582
1744E1	Divisible Numbers (easy version) brute force, math, number theory	1500	x10848
1744D	Divisibility by 2^n greedy, math, sortings	1200	x21379
1744C	Traffic Light binary search, implementation, two pointers	1000	x27139
1744B	Even-Odd Increments implementation, math	800	x23475
1744A	Number Replacement greedy, implementation	800	x27123
1743G	Antifibonacci Cut bitmasks, combinatorics, constructive algorithms, data structures, dp, hashing, math	3000	x256
1743F	Intersection and Union data structures, dp, matrices, probabilities	2300	x1488
1743E	FTL binary search, dp	2400	x1556
1743D	Problem with Random Tests brute force, dp, greedy, probabilities	1700	x7587
1743C	Save the Magazines constructive algorithms, dp, greedy	1100	x19153
1743B	Permutation Value constructive algorithms, greedy	800	x22201
1743A	Password brute force, combinatorics, implementation, math	800	x26717
1742G	Orray bitmasks, brute force, greedy, math, sortings	1500	x10719
1742F	Smaller constructive algorithms, greedy, strings	1500	x11643
1742E	Scuza binary search, greedy, math	1200	x24578
1742D	Coprime brute force, greedy, number theory	1100	x23595
1742C	Stripes implementation	900	x32897
1742B	Increasing greedy, implementation, sortings	800	x47576
1742A	Sum implementation	800	x71817
1741G	Kirill and Company bitmasks, brute force, dfs and similar, dp, flows, graphs, shortest paths	2200	x1497
1741F	Multi-Colored Segments binary search, data structures, math, sortings	2000	x2390
1741E	Sending a Sequence Over the Network dp	1600	x12195
1741D	Masha and a Beautiful Tree dfs and similar, divide and conquer, graphs, sortings, trees	1300	x15198
1741C	Minimize the Thickness brute force, greedy, math, two pointers	1100	x17737
1741B	Funny Permutation constructive algorithms, math	800	x25362
1741A	Compare T-Shirt Sizes implementation, implementation, strings	800	x30783
1740I	Arranging Crystal Balls data structures, divide and conquer, divide and conquer, dp, geometry, graphs, number theory	3500	x114
1740H	MEX Tree Manipulation data structures, trees	3300	x232
1740G	Dangerous Laser Power constructive algorithms, dsu, sortings	3100	x185
1740F	Conditional Mix combinatorics, dp, math	2600	x799
1740E	Hanging Hearts constructive algorithms, data structures, dfs and similar, dp, greedy, trees	1800	x4330
1740D	Knowledge Cards constructive algorithms, data structures	1500	x8057
1740C	Bricks and Bags constructive algorithms, games, greedy, sortings	1400	x11007
1740B	Jumbo Extra Cheese 2 geometry, greedy, sortings	800	x13739