Problemset - Codeforces

→ Pay attention

Before contest
Hello 2025
05:04:19
Register now »

*has extra registration

→ Filter Problems

Difficulty: —

Add tag

Problems

#	Name
1290B	Irreducible Anagrams binary search, constructive algorithms, data structures, strings, two pointers	1800	x5605
1290A	Mind Control brute force, data structures, implementation	1600	x8619
1288C	Two Arrays combinatorics, dp	1600	x13193
1287B	Hyperset brute force, data structures, implementation	1500	x9504
1286B	Numbers on Tree constructive algorithms, data structures, dfs and similar, graphs, greedy, trees	1800	x4782
1286A	Garland dp, greedy, sortings	1800	x8928
1285C	Fadi and LCM brute force, math, number theory	1400	x24155
1284C	New Year and Permutation combinatorics, math	1600	x8141
1284B	New Year and Ascent Sequence binary search, combinatorics, data structures, dp, implementation, sortings	1400	x10917
1283E	New Year Parties dp, greedy	1800	x6653
1283D	Christmas Trees graphs, greedy, shortest paths	1800	x7906
1283C	Friends and Gifts constructive algorithms, data structures, math	1500	x13248
1282C	Petya and Exam greedy, sortings, two pointers	1800	x4352
1282B2	K for the Price of One (Hard Version) dp, greedy, sortings	1600	x10316
1282B1	K for the Price of One (Easy Version) dp, greedy, sortings	1400	x11589
1281B	Azamon Web Services greedy	1600	x8352
1280B	Beingawesomeism implementation, math	1800	x4046
1280A	Cut and Paste implementation, math	1700	x5482
1279D	Santa's Bot combinatorics, math, probabilities	1700	x6467
1279C	Stack of Presents data structures, implementation	1400	x11811
1278C	Berry Jam data structures, dp, greedy, implementation	1700	x8126
1278B	A and B greedy, math	1500	x13449
1276A	As Simple as One and Two dp, greedy	1400	x12412
1272D	Remove One Element brute force, dp	1500	x16972
1270C	Make Good bitmasks, constructive algorithms, math	1400	x14259
1269B	Modulo Equality brute force, sortings	1500	x9226
1268A	Long Beautiful Integer constructive algorithms, greedy, implementation, strings	1700	x8711
1267L	Lexicography constructive algorithms, strings	1800	x3164
1267J	Just Arrange the Icons greedy, implementation, math	1800	x2912
1267E	Elections greedy	1700	x3343
1266C	Diverse Matrix constructive algorithms, greedy, math, number theory	1400	x9764
1264A	Beautiful Regional Contest greedy, implementation	1500	x10169
1263D	Secret Passwords dfs and similar, dsu, graphs	1500	x14308
1263C	Everyone is a Winner! binary search, math, meet-in-the-middle, number theory	1400	x13888
1263B	PIN Codes greedy, implementation	1400	x11445
1260C	Infinite Fence greedy, math, number theory	1700	x8297
1257D	Yet Another Monster Killing Problem binary search, data structures, dp, greedy, sortings, two pointers	1700	x7657
1256D	Binary String Minimizing greedy	1500	x12191
1256C	Platforms Jumping greedy	1700	x6953
1256B	Minimize the Permutation greedy	1400	x13186
1255C	League of Leesins constructive algorithms, implementation	1600	x6753
1254B1	Send Boxes to Alice (Easy Version) constructive algorithms, greedy, math, number theory, ternary search, two pointers	1800	x4721
1254A	Feeding Chicken constructive algorithms, greedy, implementation	1700	x5292
1253D	Harmonious Graph constructive algorithms, dfs and similar, dsu, graphs, greedy, sortings	1700	x9391
1253C	Sweets Eating dp, greedy, math, sortings	1500	x14462
1253B	Silly Mistake greedy, implementation	1400	x11250
1252H	Twin Buildings greedy, implementation	1800	x2701
1252C	Even Path data structures, implementation	1600	x3769
1251C	Minimize The Integer greedy, two pointers	1600	x12680
1251B	Binary Palindromes greedy, strings	1400	x11067
1250L	Divide The Students binary search, greedy, math	1500	x4150
1250J	The Parade binary search, greedy	1800	x2981
1250H	Happy Birthday math	1500	x4079
1250B	The Feast and the Bus brute force, constructive algorithms, greedy, math	1800	x2627
1250A	Berstagram implementation	1400	x4104
1249E	By Elevator or Stairs? dp, shortest paths	1700	x9891
1249D2	Too Many Segments (hard version) data structures, greedy, sortings	1800	x5342
1249D1	Too Many Segments (easy version) greedy	1800	x5161
1249C2	Good Numbers (hard version) binary search, greedy, math, meet-in-the-middle	1500	x12777
1245C	Constanze's Machine dp	1400	x17863
1244D	Paint the Tree brute force, constructive algorithms, dp, graphs, implementation, trees	1800	x7656
1243B2	Character Swap (Hard Version) strings	1600	x7129
1242A	Tile Painting constructive algorithms, math, number theory	1500	x12729
1239A	Ivan the Fool and the Probability Theory combinatorics, dp, math	1700	x7390
1238C	Standard Free2play dp, greedy, math	1600	x7487
1237C1	Balanced Removals (Easier) constructive algorithms, geometry, greedy	1700	x6126
1236B	Alice and the List of Presents combinatorics, math	1500	x11212
1234D	Distinct Characters Queries data structures	1600	x15561
1234C	Pipes dp, implementation	1500	x12759
1228C	Primes and Multiplication math, number theory	1700	x9121
1228B	Filling the Grid implementation, math	1400	x11601
1227D2	Optimal Subsequences (Hard Version) data structures, greedy	1800	x4421
1227D1	Optimal Subsequences (Easy Version) data structures, greedy	1600	x6470
1227C	Messy constructive algorithms	1700	x5551
1225D	Power Products hashing, math, number theory	1800	x8272
1225C	p-binary bitmasks, brute force, math	1600	x9075
1223C	Save the Nature binary search, greedy	1600	x8625
1221D	Make The Fence Great Again dp	1800	x9269
1219C	Periodic integer number implementation, strings	1700	x1862
1218F	Workout plan data structures, greedy	1500	x2987
1217C	The Number Of Good Substrings binary search, bitmasks, brute force	1700	x7514
1217B	Zmei Gorynich greedy, math	1600	x11340
1216C	White Sheet geometry, math	1700	x9419
1215D	Ticket Game games, greedy, math	1700	x6220
1215C	Swap Letters constructive algorithms, greedy	1500	x11338
1215B	The Number of Products combinatorics, dp, implementation	1400	x13436
1214A	Optimal Currency Exchange brute force, math	1400	x9155
1213G	Path Queries divide and conquer, dsu, graphs, sortings, trees	1800	x7546
1213D2	Equalizing by Division (hard version) brute force, math, sortings	1600	x11541
1213D1	Equalizing by Division (easy version) brute force, implementation	1500	x11490
1211C	Ice Cream *special problem, greedy, sortings	1700	x524
1211B	Traveling Around the Golden Ring of Berland *special problem, implementation	1500	x768
1210B	Marcin and Training Camp brute force, greedy	1700	x5840
1210A	Anadi and Domino brute force, graphs	1700	x5183
1209D	Cow and Snacks dfs and similar, dsu, graphs	1700	x9539
1209C	Paint the Digits constructive algorithms, greedy, implementation	1500	x7567
1208C	Magic Grid constructive algorithms	1800	x6078
1208B	Uniqueness binary search, brute force, implementation, two pointers	1500	x10640
1207D	Number Of Permutations combinatorics	1800	x6142
1207C	Gas Pipeline dp, greedy	1500	x9933