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
00:00:03

*has extra registration

Before contest
Kotlin Heroes: Episode 11
23:00:03
Register now »

→ Filter Problems

Difficulty: —

Add tag

Problems

#	Name
1579C	Ticks greedy, implementation	1500	x10574
1578M	The Mind constructive algorithms, interactive, probabilities	2700	x456
1578L	Labyrinth binary search, dsu, greedy	2400	x1130
1578K	Kingdom of Islands brute force, graphs, implementation	2800	x360
1578J	Just Kingdom brute force, data structures, dfs and similar	3100	x231
1578I	Interactive Rays geometry, interactive	3300	x63
1578H	Higher Order Functions implementation, strings	1700	x2025
1578G	Game of Chance math, probabilities	3500	x38
1578F	Framing Pictures geometry	2900	x163
1578D	Dragon Curve	3200	x46
1578C	Cactus Lady and her Cing	3500	x9
1578B	Building Forest Trails data structures, dsu	2800	x338
1578A	Anti-Tetris constructive algorithms, graphs, shortest paths	2800	x356
1575M	Managing Telephone Poles data structures, geometry	2400	x247
1575L	Longest Array Deconstruction data structures, divide and conquer, dp, sortings	2100	x1391
1575K	Knitting Batik implementation, math	2200	x698
1575J	Jeopardy of Dropped Balls binary search, brute force, dsu, implementation	1500	x3798
1575I	Illusions of the Desert data structures, trees	2300	x888
1575H	Holiday Wall Ornaments dp, strings	2200	x613
1575G	GCD Festival math, number theory	2200	x692
1575F	Finding Expected Value math	2900	x120
1575E	Eye-Pleasing City Park Tour data structures, trees	2600	x329
1575D	Divisible by Twenty-Five brute force, dfs and similar, dp	1800	x2525
1575C	Cyclic Sum data structures, fft, number theory	3000	x163
1575B	Building an Amusement Park binary search, geometry	2300	x472
1574F	Occurrences combinatorics, dfs and similar, dp, dsu, fft, graphs	2700	x623
1574E	Coloring combinatorics, constructive algorithms, implementation, math	2500	x910
1574D	The Strongest Build binary search, brute force, data structures, dfs and similar, graphs, greedy, hashing, implementation	2000	x4489
1573B	Swaps greedy, math, sortings	1400	x14538
1572F	Stations data structures	3400	x256
1572E	Polygon binary search, dp, geometry	3000	x286
1572D	Bridge Club flows, graph matchings, graphs, greedy	2800	x506
1572C	Paint dp, greedy	2700	x1482
1572B	Xor of 3 brute force, constructive algorithms, greedy, two pointers	2500	x1833
1572A	Book binary search, brute force, data structures, dp, graphs, implementation, sortings	1800	x8984
1571J	Two Railroads *special problem	3000	x40
1571I	Physical Examination *special problem, binary search, data structures	3200	x58
1571H	Laser Beams *special problem, geometry, probabilities	2900	x48
1571G	A Battle Against a Dragon *special problem, data structures, dp	2500	x75
1571F	Kotlinforces *special problem, constructive algorithms, dp	2000	x182
1571E	Fix the String *special problem, bitmasks, dp, greedy	1700	x336
1571D	Sweepstake *special problem, brute force, constructive algorithms, implementation, math	1800	x331
1571C	Rhyme *special problem, implementation	1800	x376
1569F	Palindromic Hamiltonian Path brute force, dfs and similar, dp, graphs, hashing	3000	x237
1569E	Playoff Restoration bitmasks, brute force, hashing, implementation, meet-in-the-middle	2600	x806
1569D	Inconvenient Pairs binary search, data structures, implementation, sortings, two pointers	1900	x4379
1569C	Jury Meeting combinatorics, math	1500	x12014
1567F	One-Four Overload 2-sat, constructive algorithms, dfs and similar, dsu, graphs, implementation	2700	x751
1567E	Non-Decreasing Dilemma data structures, divide and conquer, math	2200	x3635
1567D	Expression Evaluation Error constructive algorithms, greedy, implementation, math	2000	x4507
1567C	Carrying Conundrum bitmasks, combinatorics, dp, math	1600	x12165
1566H	Xor-quiz constructive algorithms, dp, interactive, math, number theory	3200	x129
1566G	Four Vertices constructive algorithms, data structures, graphs, greedy, implementation, shortest paths	3100	x339
1566F	Points Movement data structures, dp, greedy, implementation, sortings	2600	x955
1566E	Buds Re-hanging constructive algorithms, dfs and similar, dp, greedy, trees	2000	x4122
1566D2	Seating Arrangements (hard version) data structures, greedy, implementation, sortings, two pointers	1600	x7847
1562F	Tubular Bells interactive, math, number theory, probabilities	2900	x401
1562E	Rescue Niwen! dp, greedy, string suffix structures, strings	2500	x1406
1562D2	Two Hundred Twenty One (hard version) data structures, math	2200	x2129
1562D1	Two Hundred Twenty One (easy version) data structures, dp, math	1700	x6337
1562C	Rings constructive algorithms, math	1500	x13269
1561D1	Up the Strip (simplified version) brute force, data structures, dp, math, number theory	1700	x5607
1560F2	Nearest Beautiful Number (hard version) bitmasks, brute force, constructive algorithms, dfs and similar, dp, greedy	2100	x4376
1560F1	Nearest Beautiful Number (easy version) binary search, bitmasks, brute force, constructive algorithms, dfs and similar, greedy	1900	x6130
1560E	Polycarp and String Transformation binary search, implementation, sortings, strings	1800	x7958
1559E	Mocha and Stars combinatorics, dp, fft, math, number theory	2200	x2303
1559D2	Mocha and Diana (Hard Version) brute force, constructive algorithms, dfs and similar, dsu, graphs, greedy, trees, two pointers	2500	x2651
1559D1	Mocha and Diana (Easy Version) brute force, constructive algorithms, dsu, graphs, greedy, trees	1400	x13780
1558F	Strange Sort data structures, sortings	3300	x389
1558E	Down Below binary search, dfs and similar, graphs, greedy, meet-in-the-middle, shortest paths	3000	x471
1558D	Top-Notch Insertions combinatorics, data structures	2600	x967
1558C	Bottom-Tier Reversals constructive algorithms, greedy	2000	x3273
1558B	Up the Strip brute force, dp, math, number theory, two pointers	1900	x4787
1557E	Assiut Chess brute force, constructive algorithms, interactive	2800	x713
1557D	Ezzat and Grid data structures, dp, greedy	2200	x2546
1557C	Moamen and XOR bitmasks, combinatorics, dp, math, matrices	1700	x8593
1556H	DIY Tree graphs, greedy, math, probabilities	3300	x364
1556G	Gates to Another World bitmasks, data structures, dsu, two pointers	3300	x323
1556F	Sports Betting bitmasks, combinatorics, dp, graphs, math, probabilities	2500	x1240
1556E	Equilibrium data structures, dp, greedy	2200	x2706
1556D	Take a Guess bitmasks, constructive algorithms, interactive, math	1800	x6905
1556C	Compressed Bracket Sequence brute force, implementation	1800	x5786
1555F	Good Graph data structures, dsu, graphs, trees	2700	x852
1555E	Boring Segments data structures, sortings, trees, two pointers	2100	x4033
1555D	Say No to Palindromes brute force, constructive algorithms, dp, strings	1600	x12359
1554E	You dfs and similar, dp, math, number theory	2600	x1226
1554D	Diane constructive algorithms, greedy, strings	1800	x9442
1554C	Mikasa binary search, bitmasks, greedy, implementation	1800	x8868
1554B	Cobb bitmasks, brute force, greedy, math	1700	x12762
1553I	Stairs combinatorics, divide and conquer, dp, fft, math	3400	x203
1553H	XOR and Distance bitmasks, divide and conquer, trees	2900	x702
1553G	Common Divisor Graph brute force, constructive algorithms, dsu, graphs, hashing, math, number theory	2700	x1021
1553F	Pairwise Modulo data structures, math	2300	x2225
1553E	Permutation Shift brute force, combinatorics, constructive algorithms, dfs and similar, dsu, graphs, math	2100	x3329
1553D	Backspace dp, greedy, strings, two pointers	1500	x13718
1552I	Organizing a Music Festival dfs and similar, math	3400	x128
1552H	Guess the Perimeter binary search, interactive, number theory	3300	x389
1552G	A Serious Referee bitmasks, brute force, dfs and similar, sortings	3000	x527
1552F	Telepanting binary search, data structures, dp, sortings	2200	x2897
1552E	Colors and Intervals constructive algorithms, data structures, greedy, sortings	2300	x1834