Problemset - Codeforces

→ Pay attention

Before contest
Good Bye 2024: 2025 is NEAR
4 days

→ Filter Problems

Difficulty: —

Add tag

Problems

#	Name
1550C	Manhattan Subarrays brute force, geometry, greedy, implementation	1700	x10270
1550B	Maximum Cost Deletion greedy, math	1000	x26755
1550A	Find The Array greedy, math	800	x28336
1549B	Gregor and the Pawn Game dfs and similar, dp, flows, graph matchings, graphs, greedy, implementation	800	x24720
1549A	Gregor and Cryptography math, number theory	800	x32942
1548E	Gregor and the Two Painters data structures, divide and conquer, graphs, greedy, math	3400	x468
1548D2	Gregor and the Odd Cows (Hard) brute force, geometry, math, number theory	3300	x266
1548D1	Gregor and the Odd Cows (Easy) bitmasks, geometry, math, number theory	2300	x1486
1548C	The Three Little Pigs combinatorics, dp, fft, math	2500	x1851
1548B	Integers Have Friends binary search, data structures, divide and conquer, math, number theory, two pointers	1800	x10097
1548A	Web of Lies brute force, graphs, greedy	1400	x16612
1547G	How Many Paths? dfs and similar, dp, graphs, trees	2100	x3080
1547F	Array Stabilization (GCD version) binary search, brute force, data structures, divide and conquer, number theory, two pointers	1900	x5975
1547E	Air Conditioners data structures, dp, implementation, shortest paths, sortings, two pointers	1500	x14660
1547D	Co-growing Sequence bitmasks, constructive algorithms, greedy	1300	x16963
1547C	Pair Programming greedy, two pointers	1100	x22900
1547B	Alphabetical Strings greedy, implementation, strings	800	x26605
1547A	Shortest Path with Obstacle implementation, math	800	x30848
1546B	AquaMoon and Stolen String interactive, math	1200	x13246
1546A	AquaMoon and Two Arrays brute force, greedy	800	x18300
1545F	AquaMoon and Potatoes brute force, data structures, dp	3500	x111
1545E2	AquaMoon and Time Stop (hard version) data structures, dp	3500	x89
1545E1	AquaMoon and Time Stop (easy version) data structures, dp	3500	x85
1545D	AquaMoon and Wrong Coordinate constructive algorithms, interactive, math	3000	x505
1545C	AquaMoon and Permutations 2-sat, brute force, combinatorics, constructive algorithms, graph matchings, graphs	2800	x646
1545B	AquaMoon and Chess combinatorics, math	1900	x6028
1545A	AquaMoon and Strange Sort sortings	1500	x14047
1543E	The Final Pursuit bitmasks, constructive algorithms, divide and conquer, graphs, greedy, math	2700	x417
1543D2	RPD and Rap Sheet (Hard Version) brute force, constructive algorithms, interactive, math	2200	x2031
1543D1	RPD and Rap Sheet (Easy Version) bitmasks, constructive algorithms, interactive, math	1700	x7663
1543C	Need for Pink Slips bitmasks, brute force, dfs and similar, implementation, math, probabilities	1900	x5341
1543B	Customising the Track combinatorics, greedy, math	900	x23364
1543A	Exciting Bets greedy, math, number theory	900	x29098
1542E2	Abnormal Permutation Pairs (hard version) combinatorics, dp, fft, math	2700	x869
1542E1	Abnormal Permutation Pairs (easy version) combinatorics, dp, fft, math	2400	x1262
1542D	Priority Queue combinatorics, dp, implementation, math, ternary search	2200	x2678
1542C	Strange Function math, number theory	1600	x14471
1542B	Plus and Multiply constructive algorithms, math, number theory	1500	x23575
1542A	Odd Set math	800	x45675
1541B	Pleasant Pairs brute force, implementation, math, number theory	1200	x29342
1541A	Pretty Permutations constructive algorithms, greedy, implementation	800	x29609
1540E	Tasty Dishes math, matrices	3500	x108
1540D	Inverse Inversions binary search, brute force, data structures	3200	x283
1540C2	Converging Array (Hard Version) dp, math	2900	x478
1540C1	Converging Array (Easy Version) dp, math	2700	x643
1540B	Tree Array brute force, combinatorics, dp, graphs, math, probabilities, trees	2300	x2680
1540A	Great Graphs constructive algorithms, graphs, greedy, shortest paths, sortings	1400	x14062
1539F	Strange Array data structures, greedy, sortings	2600	x890
1539E	Game with Cards binary search, constructive algorithms, data structures, dp, greedy, implementation	2500	x969
1539D	PriceFixed binary search, greedy, implementation, sortings, two pointers	1600	x11801
1539C	Stable Groups greedy, sortings	1200	x23587
1539B	Love Song dp, implementation, strings	800	x24915
1539A	Contest Start combinatorics, geometry, greedy, math	1000	x20344
1538G	Gift Set binary search, greedy, math, ternary search	2100	x4621
1538F	Interesting Function binary search, dp, math, number theory	1500	x19619
1538E	Funny Substrings data structures, hashing, implementation, matrices, strings	2100	x2933
1538D	Another Problem About Dividing Numbers constructive algorithms, math, number theory	1700	x13816
1538C	Number of Pairs binary search, data structures, math, two pointers	1300	x29272
1538B	Friends and Candies greedy, math	800	x31890
1538A	Stone Game brute force, dp, greedy	800	x37340
1537F	Figure Fixing constructive algorithms, dfs and similar, dsu, graphs, greedy, math	2200	x2526
1537E2	Erase and Extend (Hard Version) binary search, data structures, greedy, hashing, string suffix structures, strings, two pointers	2200	x5286
1537E1	Erase and Extend (Easy Version) binary search, brute force, dp, greedy, hashing, implementation, string suffix structures, strings, two pointers	1600	x13287
1537D	Deleting Divisors games, math, number theory	1700	x12580
1537C	Challenging Cliffs constructive algorithms, greedy, implementation, math	1200	x28070
1537B	Bad Boy constructive algorithms, greedy, math	900	x30878
1537A	Arithmetic Array greedy, math	800	x37786
1536F	Omkar and Akmar chinese remainder theorem, combinatorics, constructive algorithms, fft, games, geometry, math, meet-in-the-middle, string suffix structures	2600	x970
1536E	Omkar and Forest combinatorics, graphs, math, shortest paths	2300	x2469
1536D	Omkar and Medians data structures, greedy, implementation	2000	x4754
1536C	Diluc and Kaeya data structures, dp, hashing, number theory	1500	x14418
1536B	Prinzessin der Verurteilung brute force, constructive algorithms, strings	1200	x19215
1536A	Omkar and Bad Story brute force, constructive algorithms	800	x20260
1535F	String Distance binary search, brute force, data structures, hashing, implementation, strings	3000	x459
1535E	Gold Transfer binary search, data structures, dp, greedy, interactive, trees	2200	x2811
1535D	Playoff Tournament data structures, dfs and similar, dp, implementation, trees	1800	x7850
1535C	Unstable String binary search, dp, greedy, implementation, strings, two pointers	1400	x16660
1535B	Array Reodering brute force, greedy, math, number theory, sortings	900	x30941
1535A	Fair Playoff brute force, implementation	800	x50737
1534H	Lost Nodes constructive algorithms, dp, graphs, interactive, sortings, trees	3500	x153
1534G	A New Beginning data structures, dp, geometry, sortings	3300	x580
1534F2	Falling Sand (Hard Version) dfs and similar, dp, graphs, greedy	3000	x569
1534F1	Falling Sand (Easy Version) dfs and similar, graphs, greedy	2500	x1263
1534E	Lost Array graphs, greedy, interactive, shortest paths	2300	x1965
1534D	Lost Tree constructive algorithms, interactive, trees	1800	x6147
1534C	Little Alawn's Puzzle combinatorics, dp, dsu, graphs, math	1300	x12925
1534B	Histogram Ugliness greedy, implementation, math	1100	x12555
1534A	Colour the Flag brute force, implementation	800	x12797
1533J	Pawns *special problem		x44
1533I	Excursions *special problem, constructive algorithms, dfs and similar, flows, graph matchings, graphs		x52
1533H	Submatrices *special problem, bitmasks, data structures, dp		x84
1533G	Biome Map *special problem, constructive algorithms, dfs and similar, graphs		x90
1533F	Binary String Partition *special problem, binary search, greedy		x215
1533E	Chess Team Forming *special problem, binary search, data structures, greedy		x277
1533D	String Searching *special problem, hashing		x443
1533C	Sweets *special problem, data structures, implementation		x474
1533B	Nearest Point Function *special problem, implementation		x772
1533A	Travel to Bertown *special problem, implementation, math		x1078
1532F	Prefixes and Suffixes *special problem, strings		x219
1532E	Good Array *special problem		x391