Problemset - Codeforces

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Before contest
Codeforces Round 941 (Div. 1)
4 days

Before contest
Codeforces Round 941 (Div. 2)
4 days

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Difficulty: —

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Problems

#	Name
1654H	Three Minimums combinatorics, constructive algorithms, divide and conquer, dp, fft, math	3500	x69
1704H2	Game of AI (hard version) combinatorics, fft, math	3500	x74
1687F	Koishi's Unconscious Permutation fft, math	3500	x77
1896H2	Cyclic Hamming (Hard Version) brute force, dp, fft, math, number theory	3500	x84
1704G	Mio and Lucky Array constructive algorithms, fft, math, strings	3500	x96
1349F2	Slime and Sequences (Hard Version) dp, fft, math	3500	x107
1477F	Nezzar and Chocolate Bars combinatorics, fft, math, probabilities	3500	x121
1054H	Epic Convolution chinese remainder theorem, fft, math, number theory	3500	x171
1479E	School Clubs dp, fft, math, number theory, probabilities	3500	x180
1270I	Xor on Figures constructive algorithms, fft, math	3500	x226
1896H1	Cyclic Hamming (Easy Version) brute force, divide and conquer, dp, fft, math, number theory	3400	x77
1936E	Yet Yet Another Permutation Problem divide and conquer, fft, math	3400	x93
1770G	Koxia and Bracket divide and conquer, fft, math	3400	x147
773F	Test Data Generation combinatorics, divide and conquer, dp, fft, math, number theory	3400	x184
1553I	Stairs combinatorics, divide and conquer, dp, fft, math	3400	x195
848E	Days of Floral Colours combinatorics, divide and conquer, dp, fft, math	3400	x200
1010F	Tree fft, graphs, trees	3400	x208
1103E	Radix sum fft, math, number theory	3400	x214
715E	Complete the Permutations combinatorics, fft, graphs, math	3400	x341
901E	Cyclic Cipher fft, math	3300	x84
1580F	Problems for Codeforces combinatorics, fft, math	3300	x130
1641E	Special Positions combinatorics, divide and conquer, fft, math	3300	x202
1392I	Kevin and Grid fft, graphs, math	3300	x202
1528F	AmShZ Farm combinatorics, fft, math	3300	x272
623E	Transforming Sequence combinatorics, dp, fft, math	3300	x526
1704H1	Game of AI (easy version) combinatorics, constructive algorithms, dp, fft, math	3200	x170
1119H	Triple fft, math	3200	x507
553E	Kyoya and Train dp, fft, graphs, math, probabilities	3200	x528
755G	PolandBall and Many Other Balls combinatorics, divide and conquer, dp, fft, math, number theory	3200	x850
1488J	Flower Shop *special problem, data structures, fft, math	3100	x31
1184A3	Heidi Learns Hashing (Hard) fft, math, number theory	3100	x136
1286F	Harry The Potter brute force, constructive algorithms, dp, fft, implementation, math	3100	x232
981H	K Paths combinatorics, data structures, dp, fft, math	3100	x264
986D	Perfect Encoding fft, math	3100	x320
1439D	INOI Final Contests combinatorics, dp, fft	3100	x337
1349F1	Slime and Sequences (Easy Version) dp, fft, math	3100	x395
923E	Perpetual Subtraction fft, math, matrices	3100	x435
438E	The Child and Binary Tree combinatorics, divide and conquer, fft, number theory	3100	x1773
1575C	Cyclic Sum data structures, fft, number theory	3000	x153
1667E	Centroid Probabilities combinatorics, dp, fft, math	3000	x620
1644F	Basis combinatorics, fft, math, number theory	2900	x310
1334G	Substring Search bitmasks, brute force, fft	2900	x353
1792F2	Graph Coloring (hard version) brute force, combinatorics, divide and conquer, dp, fft, graphs	2900	x372
1450H1	Multithreading (Easy Version) combinatorics, fft, math	2900	x373
960G	Bandit Blues combinatorics, dp, fft, math	2900	x1022
1773G	Game of Questions bitmasks, combinatorics, dp, fft, math, probabilities	2800	x318
1845F	Swimmers in the Pool dp, fft, math, number theory	2800	x348
1033F	Boolean Computer bitmasks, brute force, fft, math	2800	x364
1473G	Tiles combinatorics, dp, fft, math	2800	x378
850E	Random Elections bitmasks, brute force, divide and conquer, fft, math	2800	x378
472G	Design Tutorial: Increase the Constraints bitmasks, data structures, fft	2800	x390
286E	Ladies' Shop constructive algorithms, fft, math	2800	x818
1671F	Permutation Counting brute force, combinatorics, dp, fft, math	2700	x314
1574F	Occurrences combinatorics, dfs and similar, dp, dsu, fft, graphs	2700	x571
1487G	String Counting combinatorics, dp, fft, math	2700	x572
827E	Rusty String fft, math, strings	2700	x786
1542E2	Abnormal Permutation Pairs (hard version) combinatorics, dp, fft, math	2700	x802
1408G	Clusterization Counting combinatorics, dp, dsu, fft, graphs, trees	2700	x920
1856E2	PermuTree (hard version) bitmasks, dfs and similar, dp, fft, greedy, implementation, math, trees	2700	x1301
754E	Dasha and cyclic table bitmasks, brute force, fft, strings, trees	2600	x479
1257G	Divisor Set divide and conquer, fft, greedy, math, number theory	2600	x570
958F3	Lightsabers (hard) fft	2600	x660
1613F	Tree Coloring combinatorics, divide and conquer, fft	2600	x664
1821F	Timber combinatorics, dp, fft, math	2600	x697
1398G	Running Competition bitmasks, fft, math, number theory	2600	x760
914G	Sum the Fibonacci bitmasks, divide and conquer, dp, fft, math	2600	x892
1536F	Omkar and Akmar chinese remainder theorem, combinatorics, constructive algorithms, fft, games, geometry, math, meet-in-the-middle, string suffix structures	2600	x912
662C	Binary Table bitmasks, brute force, divide and conquer, dp, fft, math	2600	x1937
1218E	Product Tuples divide and conquer, fft	2500	x355
1709F	Multiset of Strings bitmasks, brute force, dp, fft, flows, graphs, math, meet-in-the-middle, trees	2500	x526
1731F	Function Sum brute force, combinatorics, dp, fft, math	2500	x654
1251F	Red-White Fence combinatorics, fft	2500	x796
1548C	The Three Little Pigs combinatorics, dp, fft, math	2500	x1733
528D	Fuzzy Search bitmasks, brute force, fft	2500	x2044
1218D	Xor Spanning Tree divide and conquer, fft, graphs	2400	x312
1542E1	Abnormal Permutation Pairs (easy version) combinatorics, dp, fft, math	2400	x1180
1608D	Dominoes combinatorics, fft, graphs, math, number theory	2400	x1345
1726E	Almost Perfect combinatorics, fft, math	2400	x1346
1096G	Lucky Tickets divide and conquer, dp, fft	2400	x1366
1036E	Covered Points fft, geometry, number theory	2400	x1406
632E	Thief in a Shop divide and conquer, dp, fft, math	2400	x2541
300D	Painting Square dp, fft	2300	x731
993E	Nikita and Order Statistics chinese remainder theorem, fft, math	2300	x1335
1342E	Placing Rooks combinatorics, fft, math	2300	x2801
954I	Yet Another String Matching Problem fft, math	2200	x957
1559E	Mocha and Stars combinatorics, dp, fft, math, number theory	2200	x2210
1438C	Engineer Artem 2-sat, chinese remainder theorem, constructive algorithms, fft, flows	2000	x10134
1909I	Short Permutation Problem combinatorics, dp, fft, math	1900	x73
1119E	Pavel and Triangles brute force, dp, fft, greedy, ternary search	1900	x4844