Problemset - Codeforces

Please subscribe to the official Codeforces channel in Telegram via the link https://t.me/codeforces_official. ×

→ Pay attention

Before contest
Codeforces Round (Div. 2)
31:08:05
Register now »

*has extra registration

→ Filter Problems

Difficulty: —

Add tag

Problems

#	Name
1313C1	Skyscrapers (easy version) brute force, data structures, dp, greedy	1500	x10337
1313B	Different Rules constructive algorithms, greedy, implementation, math	1700	x6652
1312D	Count the Arrays combinatorics, math	1700	x9273
1312C	Adding Powers bitmasks, greedy, implementation, math, number theory, ternary search	1400	x16246
1310A	Recommendations data structures, greedy, sortings	1700	x5148
1307C	Cow and Message brute force, dp, math, strings	1500	x11746
1305C	Kuroni and Impossible Calculation brute force, combinatorics, math, number theory	1600	x14201
1304D	Shortest and Longest LIS constructive algorithms, graphs, greedy, two pointers	1800	x6274
1304C	Air Conditioner dp, greedy, implementation, sortings, two pointers	1500	x16165
1303C	Perfect Keyboard dfs and similar, greedy, implementation	1600	x12081
1303B	National Project math	1400	x15622
1301C	Ayoub's function binary search, combinatorics, greedy, math, strings	1700	x9266
1301B	Motarack's Birthday binary search, greedy, ternary search	1500	x14093
1299B	Aerodynamic geometry	1800	x5216
1299A	Anu Has a Function brute force, greedy, math	1500	x11951
1296E1	String Coloring (easy version) constructive algorithms, dp, graphs, greedy, sortings	1800	x7380
1296D	Fight with Monsters greedy, sortings	1500	x14151
1296C	Yet Another Walking Robot data structures, implementation	1500	x14702
1295D	Same GCDs math, number theory	1800	x8717
1295C	Obtain The String dp, greedy, strings	1600	x12797
1295B	Infinite Prefixes math, strings	1700	x9258
1294D	MEX maximizing data structures, greedy, implementation, math	1600	x11602
1292B	Aroma's Search brute force, constructive algorithms, geometry, greedy, implementation	1700	x6284
1292A	NEKO's Maze Game data structures, dsu, implementation	1400	x13149
1290B	Irreducible Anagrams binary search, constructive algorithms, data structures, strings, two pointers	1800	x5245
1290A	Mind Control brute force, data structures, implementation	1600	x8531
1288C	Two Arrays combinatorics, dp	1600	x12625
1287B	Hyperset brute force, data structures, implementation	1500	x9392
1286B	Numbers on Tree constructive algorithms, data structures, dfs and similar, graphs, greedy, trees	1800	x4640
1286A	Garland dp, greedy, sortings	1800	x8682
1285C	Fadi and LCM brute force, math, number theory	1400	x22863
1284C	New Year and Permutation combinatorics, math	1600	x7950
1284B	New Year and Ascent Sequence binary search, combinatorics, data structures, dp, implementation, sortings	1400	x10784
1283E	New Year Parties dp, greedy	1800	x6487
1283D	Christmas Trees graphs, greedy, shortest paths	1800	x7691
1283C	Friends and Gifts constructive algorithms, data structures, math	1500	x13048
1282C	Petya and Exam greedy, sortings, two pointers	1800	x4270
1282B2	K for the Price of One (Hard Version) dp, greedy, sortings	1600	x10090
1282B1	K for the Price of One (Easy Version) dp, greedy, sortings	1400	x11406
1281B	Azamon Web Services greedy	1600	x8239
1280B	Beingawesomeism implementation, math	1800	x3912
1280A	Cut and Paste implementation, math	1700	x5349
1279D	Santa's Bot combinatorics, math, probabilities	1700	x6163
1279C	Stack of Presents data structures, implementation	1400	x11620
1278C	Berry Jam data structures, dp, greedy, implementation	1700	x7914
1278B	A and B greedy, math	1500	x13148
1276A	As Simple as One and Two dp, greedy	1400	x12241
1272D	Remove One Element brute force, dp	1500	x16287
1270C	Make Good bitmasks, constructive algorithms, math	1400	x13930
1269B	Modulo Equality brute force, sortings	1500	x9083
1268A	Long Beautiful Integer constructive algorithms, greedy, implementation, strings	1700	x8503
1267L	Lexicography constructive algorithms, strings	1800	x3006
1267J	Just Arrange the Icons greedy, implementation, math	1800	x2783
1267E	Elections greedy	1700	x3153
1266C	Diverse Matrix constructive algorithms, greedy, math, number theory	1400	x9587
1264A	Beautiful Regional Contest greedy, implementation	1500	x10017
1263D	Secret Passwords dfs and similar, dsu, graphs	1500	x13720
1263C	Everyone is a Winner! binary search, math, meet-in-the-middle, number theory	1400	x13578
1263B	PIN Codes greedy, implementation	1400	x11299
1260C	Infinite Fence greedy, math, number theory	1700	x8177
1257D	Yet Another Monster Killing Problem binary search, data structures, dp, greedy, sortings, two pointers	1700	x7479
1256D	Binary String Minimizing greedy	1500	x11937
1256C	Platforms Jumping greedy	1700	x6833
1256B	Minimize the Permutation greedy	1400	x13006
1255C	League of Leesins constructive algorithms, implementation	1600	x6668
1254B1	Send Boxes to Alice (Easy Version) constructive algorithms, greedy, math, number theory, ternary search, two pointers	1800	x4591
1254A	Feeding Chicken constructive algorithms, greedy, implementation	1700	x5144
1253D	Harmonious Graph constructive algorithms, dfs and similar, dsu, graphs, greedy, sortings	1700	x9070
1253C	Sweets Eating dp, greedy, math, sortings	1500	x14099
1253B	Silly Mistake greedy, implementation	1400	x11115
1252H	Twin Buildings greedy, implementation	1800	x2608
1252C	Even Path data structures, implementation	1600	x3648
1251C	Minimize The Integer greedy, two pointers	1600	x12102
1251B	Binary Palindromes greedy, strings	1400	x10928
1250L	Divide The Students binary search, greedy, math	1500	x4056
1250J	The Parade binary search, greedy	1800	x2892
1250H	Happy Birthday math	1500	x4014
1250B	The Feast and the Bus brute force, constructive algorithms, greedy, math	1800	x2585
1250A	Berstagram implementation	1400	x4051
1249E	By Elevator or Stairs? dp, shortest paths	1700	x9516
1249D2	Too Many Segments (hard version) data structures, greedy, sortings	1800	x5162
1249D1	Too Many Segments (easy version) greedy	1800	x5030
1249C2	Good Numbers (hard version) binary search, greedy, math, meet-in-the-middle	1500	x12493
1245C	Constanze's Machine dp	1400	x17270
1244D	Paint the Tree brute force, constructive algorithms, dp, graphs, implementation, trees	1800	x7449
1243B2	Character Swap (Hard Version) strings	1600	x7055
1242A	Tile Painting constructive algorithms, math, number theory	1500	x12505
1239A	Ivan the Fool and the Probability Theory combinatorics, dp, math	1700	x7297
1238C	Standard Free2play dp, greedy, math	1600	x7347
1237C1	Balanced Removals (Easier) constructive algorithms, geometry, greedy	1700	x6045
1236B	Alice and the List of Presents combinatorics, math	1500	x10937
1234D	Distinct Characters Queries data structures	1600	x14619
1234C	Pipes dp, implementation	1500	x12453
1228C	Primes and Multiplication math, number theory	1700	x8932
1228B	Filling the Grid implementation, math	1400	x11482
1227D2	Optimal Subsequences (Hard Version) data structures, greedy	1800	x4285
1227D1	Optimal Subsequences (Easy Version) data structures, greedy	1600	x6348
1227C	Messy constructive algorithms	1700	x5486
1225D	Power Products hashing, math, number theory	1800	x7758
1225C	p-binary bitmasks, brute force, math	1600	x8867