Problemset - Codeforces

→ Pay attention

Before contest
Hello 2025
4 days

→ Filter Problems

Difficulty: —

Add tag

Problems

#	Name
1184C3	Heidi and the Turing Test (Hard)	3200	x41
1184C2	Heidi and the Turing Test (Medium) data structures	2200	x633
1184C1	Heidi and the Turing Test (Easy) implementation	1600	x2325
1184B3	The Doctor Meets Vader (Hard) flows, shortest paths	2700	x174
1184B2	The Doctor Meets Vader (Medium) flows, graph matchings, graphs, shortest paths, sortings	2200	x601
1184B1	The Doctor Meets Vader (Easy) binary search, sortings	1400	x5459
1184A3	Heidi Learns Hashing (Hard) fft, math, number theory	3100	x140
1184A2	Heidi Learns Hashing (Medium) brute force, number theory	2100	x1002
1184A1	Heidi Learns Hashing (Easy) brute force, math, number theory	1200	x6038
1183H	Subsequences (hard version) dp, strings	1900	x3227
1183G	Candy Box (hard version) greedy, implementation, sortings	2000	x2400
1183F	Topforces Strikes Back brute force, math, sortings	2100	x2055
1183E	Subsequences (easy version) dp, graphs, implementation, shortest paths	2000	x4927
1183D	Candy Box (easy version) greedy, sortings	1400	x14912
1183C	Computer Game binary search, math	1400	x14148
1183B	Equalize Prices math	900	x18648
1183A	Nearest Interesting Number implementation	800	x25250
1182F	Maximum Sine binary search, data structures, number theory	2700	x347
1182E	Product Oriented Recurrence dp, math, matrices, number theory	2300	x2880
1182D	Complete Mirror constructive algorithms, dfs and similar, dp, hashing, implementation, trees	2400	x868
1182C	Beautiful Lyrics data structures, greedy, strings	1700	x4443
1182B	Plus from Picture dfs and similar, implementation, strings	1300	x11221
1182A	Filling Shapes dp, math	1000	x31811
1181E2	A Story of One Country (Hard) brute force, greedy, sortings	3000	x292
1181E1	A Story of One Country (Easy) brute force, divide and conquer, sortings	2500	x490
1181D	Irrigation binary search, data structures, implementation, sortings, trees, two pointers	2200	x2453
1181C	Flag brute force, combinatorics, dp, implementation	1900	x3168
1181B	Split a Number greedy, implementation, strings	1500	x6346
1181A	Chunga-Changa greedy, math	1000	x13812
1180B	Nick and Array greedy, implementation	1500	x9650
1180A	Alex and a Rhombus dp, implementation, math	800	x25567
1179E	Alesya and Discrete Math divide and conquer, interactive	3200	x179
1179D	Fedor Runs for President data structures, dp, trees	2700	x850
1179C	Serge and Dining Room binary search, data structures, graph matchings, greedy, implementation, math, trees	2200	x2109
1179B	Tolik and His Uncle constructive algorithms	1800	x4409
1179A	Valeriy and Deque data structures, implementation	1500	x10741
1178H	Stock Exchange binary search, flows, graphs	3500	x258
1178G	The Awesomest Vertex data structures, dfs and similar	3000	x515
1178F2	Long Colorful Strip dp	2600	x918
1178F1	Short Colorful Strip combinatorics, dfs and similar, dp	2200	x2141
1178E	Archaeology brute force, constructive algorithms, greedy, strings	1900	x4352
1178D	Prime Graph constructive algorithms, greedy, math, number theory	1500	x7489
1178C	Tiles combinatorics, greedy, math	1300	x12125
1178B	WOW Factor dp, strings	1300	x15845
1178A	Prime Minister greedy	800	x10530
1177B	Digits Sequence (Hard Edition) binary search, divide and conquer, implementation	1800	x2616
1177A	Digits Sequence (Easy Edition) implementation	1000	x5827
1176F	Destroy it! dp, implementation, sortings	2100	x2076
1176E	Cover it! dfs and similar, dsu, graphs, shortest paths, trees	1700	x11443
1176D	Recover it! dfs and similar, graphs, greedy, number theory, sortings	1800	x5354
1176C	Lose it! dp, greedy, implementation	1300	x14363
1176B	Merge it! math	1100	x17324
1176A	Divide it! brute force, greedy, implementation	800	x23185
1175G	Yet Another Partiton Problem data structures, divide and conquer, dp, geometry, two pointers	3000	x529
1175F	The Number of Subpermutations brute force, data structures, divide and conquer, hashing, math	2500	x1967
1175E	Minimal Segment Cover data structures, dfs and similar, divide and conquer, dp, greedy, implementation, trees	2200	x3748
1175D	Array Splitting greedy, sortings	1900	x6373
1175C	Electrification binary search, brute force, greedy	1600	x6865
1175B	Catch Overflow! data structures, expression parsing, implementation	1600	x10843
1175A	From Hero to Zero implementation, math	900	x18429
1174F	Ehab and the Big Finale constructive algorithms, divide and conquer, graphs, implementation, interactive, trees	2400	x1754
1174E	Ehab and the Expected GCD Problem combinatorics, dp, math, number theory	2500	x1577
1174D	Ehab and the Expected XOR Problem bitmasks, constructive algorithms	1900	x4735
1174C	Ehab and a Special Coloring Problem constructive algorithms, number theory	1300	x12111
1174B	Ehab Is an Odd Person sortings	1200	x15652
1174A	Ehab Fails to Be Thanos constructive algorithms, greedy, sortings	1000	x17879
1173B	Nauuo and Chess constructive algorithms, greedy	1100	x9129
1173A	Nauuo and Votes greedy	800	x16303
1172F	Nauuo and Bug data structures	3300	x526
1172E	Nauuo and ODT data structures	3300	x318
1172D	Nauuo and Portals constructive algorithms	2900	x517
1172C2	Nauuo and Pictures (hard version) dp, probabilities	2600	x866
1172C1	Nauuo and Pictures (easy version) dp, probabilities	2300	x1106
1172B	Nauuo and Circle combinatorics, dfs and similar, dp, trees	1900	x4100
1172A	Nauuo and Cards greedy, implementation	1800	x5007
1170I	Good Subsets *special problem, dp		x40
1170H	Longest Saw *special problem, constructive algorithms		x48
1170G	Graph Decomposition *special problem, graphs		x74
1170F	Wheels *special problem, binary search, greedy		x122
1170E	Sliding Doors *special problem, binary search		x261
1170D	Decoding of Integer Sequences *special problem, data structures, implementation		x475
1170C	Minus and Minus Give Plus *special problem, implementation, strings		x800
1170B	Bad Days *special problem, implementation		x1094
1170A	Three Integers Again *special problem, math		x1487
1169B	Pairs graphs, implementation	1500	x9902
1169A	Circle Metro implementation, math	900	x12123
1168E	Xor Permutations constructive algorithms, math	3100	x379
1168D	Anagram Paths dp, implementation, trees	3000	x384
1168C	And Reachability bitmasks, dp	2200	x2451
1168B	Good Triple brute force, two pointers	1900	x3615
1168A	Increasing by Modulo binary search, greedy	1700	x6945
1167G	Low Budget Inception brute force, geometry	3100	x150
1167F	Scalar Queries combinatorics, data structures, math, sortings	2300	x1662
1167E	Range Deleting binary search, combinatorics, data structures, two pointers	2100	x2706
1167D	Bicolored RBS constructive algorithms, greedy	1500	x7024
1167C	News Distribution dfs and similar, dsu, graphs	1400	x19161
1167B	Lost Numbers brute force, divide and conquer, interactive, math	1400	x12242
1167A	Telephone Number brute force, greedy, strings	800	x19481
1166F	Vicky's Delivery Service data structures, dsu, graphs, hashing	2400	x737
1166E	The LCMs Must be Large bitmasks, brute force, constructive algorithms, math, number theory	2100	x2856