Problemset - Codeforces

→ Pay attention

Before contest
Ethflow Round 1 (Codeforces Round, Div. 1 + Div. 2)
3 days
Register now »

*has extra registration

→ Filter Problems

Difficulty: —

Add tag

Problems

#	Name
1354A	Alarm Clock math	900	x24036
1353F	Decreasing Heights brute force, dp	2200	x3389
1353E	K-periodic Garland brute force, dp, greedy	1900	x7284
1353D	Constructing the Array constructive algorithms, data structures, sortings	1600	x18458
1353C	Board Moves math	1000	x36052
1353B	Two Arrays And Swaps greedy, sortings	800	x51004
1353A	Most Unstable Array constructive algorithms, greedy, math	800	x41616
1352G	Special Permutation constructive algorithms	1600	x21974
1352F	Binary String Reconstruction constructive algorithms, dfs and similar, math	1500	x17671
1352E	Special Elements brute force, implementation, two pointers	1500	x21251
1352D	Alice, Bob and Candies implementation	1300	x26918
1352C	K-th Not Divisible by n binary search, math	1200	x57571
1352B	Same Parity Summands constructive algorithms, math	1200	x38823
1352A	Sum of Round Numbers implementation, math	800	x84057
1351C	Skier data structures, implementation	1400	x8717
1351B	Square? brute force, implementation, math	900	x17253
1351A	A+B (Trial Problem) implementation	800	x24505
1350B	Orac and Models dp, math, number theory	1400	x23310
1350A	Orac and Factors math	900	x26290
1349F2	Slime and Sequences (Hard Version) dp, fft, math	3500	x115
1349F1	Slime and Sequences (Easy Version) dp, fft, math	3100	x456
1349E	Slime and Hats constructive algorithms, dp, greedy	3500	x93
1349D	Slime and Biscuits math, probabilities	3200	x933
1349C	Orac and Game of Life dfs and similar, graphs, implementation, shortest paths	2000	x4577
1349B	Orac and Medians constructive algorithms, greedy, math	2000	x8280
1349A	Orac and LCM data structures, math, number theory	1600	x17764
1348F	Phoenix and Memory data structures, dfs and similar, graphs, greedy	2600	x829
1348E	Phoenix and Berries brute force, dp, greedy, math	2400	x2271
1348D	Phoenix and Science binary search, constructive algorithms, greedy, implementation, math	1900	x8968
1348C	Phoenix and Distribution constructive algorithms, greedy, sortings, strings	1600	x14774
1348B	Phoenix and Beauty constructive algorithms, data structures, greedy, sortings	1400	x25775
1348A	Phoenix and Balance greedy, math	800	x40083
1346I	Pac-Man 2.0 *special problem, dp	2900	x50
1346H	Game with Segments *special problem, data structures, games	2700	x51
1346G	Two IP Cameras *special problem, math, number theory	2300	x138
1346F	Dune II: Battle For Arrakis *special problem, data structures, greedy, math	2000	x232
1346E	Magic Tricks *special problem, dp, graphs	1700	x383
1346D	Constructing the Dungeon *special problem, graphs, greedy	1600	x516
1346C	Spring Cleaning *special problem, greedy, sortings	1600	x613
1346B	Boot Camp *special problem, greedy	1400	x1218
1346A	Color Revolution *special problem, math	1000	x2067
1345B	Card Constructions binary search, brute force, dp, math	1100	x26916
1345A	Puzzle Pieces math	800	x24351
1344F	Piet's Palette matrices	3200	x457
1344E	Train Tracks data structures, trees	3100	x469
1344D	Résumé Review binary search, greedy, math	2700	x1193
1344C	Quantifier Question dfs and similar, dp, graphs, math	2600	x1882
1344B	Monopole Magnets constructive algorithms, dfs and similar, dsu, graphs	2000	x6124
1344A	Hilbert's Hotel math, number theory, sortings	1600	x15798
1343F	Restore the Permutation by Sorted Segments brute force, constructive algorithms, data structures, greedy, implementation	2400	x1295
1343E	Weights Distributing brute force, graphs, greedy, shortest paths, sortings	2100	x5268
1343D	Constant Palindrome Sum brute force, data structures, greedy, two pointers	1700	x12845
1343C	Alternating Subsequence dp, greedy, two pointers	1200	x39223
1343B	Balanced Array constructive algorithms, math	800	x58087
1343A	Candies brute force, math	900	x48969
1342F	Make It Ascending bitmasks, brute force, dp	3000	x784
1342E	Placing Rooks combinatorics, fft, math	2300	x3154
1342D	Multiple Testcases binary search, constructive algorithms, data structures, greedy, sortings, two pointers	1900	x6155
1342C	Yet Another Counting Problem math, number theory	1600	x14212
1342B	Binary Period constructive algorithms, strings	1100	x23878
1342A	Road To Zero greedy, math	1000	x41656
1341B	Nastya and Door greedy, implementation	1300	x20019
1341A	Nastya and Rice math	900	x29286
1340F	Nastya and CBS brute force, data structures, hashing	3300	x549
1340E	Nastya and Bees graphs, interactive, probabilities	3000	x53
1340D	Nastya and Time Machine constructive algorithms, dfs and similar, graphs, trees	2600	x1005
1340C	Nastya and Unexpected Guest dfs and similar, dp, graphs, shortest paths	2400	x2280
1340B	Nastya and Scoreboard bitmasks, dp, graphs, greedy	1700	x7914
1340A	Nastya and Strange Generator brute force, data structures, greedy, implementation	1500	x13455
1339B	Sorted Adjacent Differences constructive algorithms, sortings	1200	x26787
1339A	Filling Diamonds brute force, dp, implementation, math	900	x32470
1338E	JYPnation graphs	3500	x249
1338D	Nested Rubber Bands constructive algorithms, dfs and similar, dp, math, trees	2700	x1032
1338C	Perfect Triples bitmasks, brute force, constructive algorithms, divide and conquer, math	2200	x3263
1338B	Edge Weight Assignment bitmasks, constructive algorithms, dfs and similar, greedy, math, trees	1800	x8570
1338A	Powered Addition greedy, math	1500	x24899
1337B	Kana and Dragon Quest game greedy, implementation, math	900	x34756
1337A	Ichihime and Triangle constructive algorithms, math	800	x39289
1336F	Journey data structures, divide and conquer, graphs, trees	3500	x232
1336E2	Chiori and Doll Picking (hard version) bitmasks, brute force, combinatorics, math	3500	x359
1336E1	Chiori and Doll Picking (easy version) bitmasks, brute force, combinatorics, math	2700	x715
1336D	Yui and Mahjong Set constructive algorithms, interactive	3200	x489
1336C	Kaavi and Magic Spell dp, strings	2200	x3661
1336B	Xenia and Colorful Gems binary search, greedy, math, sortings, two pointers	1700	x11557
1336A	Linova and Kingdom dfs and similar, dp, greedy, sortings, trees	1600	x20956
1335F	Robots on a Grid data structures, dfs and similar, dsu, graphs, greedy, matrices	2200	x2213
1335E2	Three Blocks Palindrome (hard version) brute force, data structures, dp, two pointers	1800	x8463
1335E1	Three Blocks Palindrome (easy version) binary search, brute force, data structures, dp, two pointers	1700	x10998
1335D	Anti-Sudoku constructive algorithms, implementation	1300	x27836
1335C	Two Teams Composing binary search, greedy, implementation, sortings	1100	x35482
1335B	Construct the String constructive algorithms	900	x39210
1335A	Candies and Two Sisters math	800	x88423
1334G	Substring Search bitmasks, brute force, fft	2900	x377
1334F	Strange Function binary search, data structures, dp, greedy	2500	x1352
1334E	Divisor Paths combinatorics, graphs, greedy, math, number theory	2200	x2884
1334D	Minimum Euler Cycle constructive algorithms, graphs, greedy, implementation	1800	x7402
1334C	Circle of Monsters brute force, constructive algorithms, greedy, math	1600	x16924
1334B	Middle Class greedy, sortings	1100	x26175
1334A	Level Statistics implementation, math	1200	x23511
1333F	Kate and imperfection greedy, implementation, math, number theory, sortings, two pointers	2200	x4328