Problemset - Codeforces

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Refact.ai Match 1 (Codeforces Round 985)
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Problems

#	Name
2025E	Card Game combinatorics, dp, fft, greedy, math	2200	x1626
2021E1	Digital Village (Easy Version) brute force, data structures, dfs and similar, dp, dsu, fft, graphs, greedy, implementation, math, trees	2300	x1410
1991H	Prime Split Game bitmasks, dp, fft, games, math, number theory	3300	x501
1988F	Heartbeat combinatorics, dp, fft, math	3000	x193
1975G	Zimpha Fan Club fft, greedy, math, strings	3000	x223
1967E1	Again Counting Arrays (Easy Version) combinatorics, dp, fft, math	3100	x213
1936E	Yet Yet Another Permutation Problem divide and conquer, fft, math	3400	x123
1909I	Short Permutation Problem combinatorics, dp, fft, math	1900	x119
1896H2	Cyclic Hamming (Hard Version) brute force, dp, fft, math, number theory	3500	x104
1896H1	Cyclic Hamming (Easy Version) brute force, divide and conquer, dp, fft, math, number theory	3400	x89
1856E2	PermuTree (hard version) bitmasks, dfs and similar, dp, fft, greedy, implementation, math, trees	2700	x1426
1845F	Swimmers in the Pool dp, fft, math, number theory	2800	x373
1821F	Timber combinatorics, dp, fft, math	2600	x761
1792F2	Graph Coloring (hard version) brute force, combinatorics, divide and conquer, dp, fft, graphs	2900	x392
1773G	Game of Questions bitmasks, combinatorics, dp, fft, math, probabilities	2800	x373
1770G	Koxia and Bracket divide and conquer, fft, math	3400	x158
1731F	Function Sum brute force, combinatorics, dp, fft, math	2500	x704
1726E	Almost Perfect combinatorics, fft, math	2400	x1432
1709F	Multiset of Strings bitmasks, brute force, dp, fft, flows, graphs, math, meet-in-the-middle, trees	2500	x553
1704H2	Game of AI (hard version) combinatorics, fft, math	3500	x88
1704H1	Game of AI (easy version) combinatorics, constructive algorithms, dp, fft, math	3200	x186
1704G	Mio and Lucky Array constructive algorithms, fft, math, strings	3500	x113
1687F	Koishi's Unconscious Permutation fft, math	3500	x85
1671F	Permutation Counting brute force, combinatorics, dp, fft, math	2700	x333
1667E	Centroid Probabilities combinatorics, dp, fft, math	3000	x658
1654H	Three Minimums combinatorics, constructive algorithms, divide and conquer, dp, fft, math	3500	x78
1644F	Basis combinatorics, fft, math, number theory	2900	x327
1641E	Special Positions combinatorics, divide and conquer, fft, math	3300	x209
1613F	Tree Coloring combinatorics, divide and conquer, fft	2600	x693
1608D	Dominoes combinatorics, fft, graphs, math, number theory	2400	x1397
1580F	Problems for Codeforces combinatorics, fft, math	3300	x133
1575C	Cyclic Sum data structures, fft, number theory	3000	x164
1574F	Occurrences combinatorics, dfs and similar, dp, dsu, fft, graphs	2700	x627
1559E	Mocha and Stars combinatorics, dp, fft, math, number theory	2200	x2322
1553I	Stairs combinatorics, divide and conquer, dp, fft, math	3400	x203
1548C	The Three Little Pigs combinatorics, dp, fft, math	2500	x1840
1542E2	Abnormal Permutation Pairs (hard version) combinatorics, dp, fft, math	2700	x862
1542E1	Abnormal Permutation Pairs (easy version) combinatorics, dp, fft, math	2400	x1252
1536F	Omkar and Akmar chinese remainder theorem, combinatorics, constructive algorithms, fft, games, geometry, math, meet-in-the-middle, string suffix structures	2600	x961
1528F	AmShZ Farm combinatorics, fft, math	3300	x289
1488J	Flower Shop *special problem, data structures, fft, math	3100	x35
1487G	String Counting combinatorics, dp, fft, math	2700	x599
1479E	School Clubs dp, fft, math, number theory, probabilities	3500	x211
1477F	Nezzar and Chocolate Bars combinatorics, fft, math, probabilities	3500	x133
1473G	Tiles combinatorics, dp, fft, math	2800	x397
1450H1	Multithreading (Easy Version) combinatorics, fft, math	2900	x439
1439D	INOI Final Contests combinatorics, dp, fft	3100	x382
1438C	Engineer Artem 2-sat, chinese remainder theorem, constructive algorithms, fft, flows	2000	x10575
1408G	Clusterization Counting combinatorics, dp, dsu, fft, graphs, trees	2700	x1065
1398G	Running Competition bitmasks, fft, math, number theory	2600	x1114
1392I	Kevin and Grid fft, graphs, math	3300	x204
1349F2	Slime and Sequences (Hard Version) dp, fft, math	3500	x114
1349F1	Slime and Sequences (Easy Version) dp, fft, math	3100	x416
1342E	Placing Rooks combinatorics, fft, math	2300	x3104
1334G	Substring Search bitmasks, brute force, fft	2900	x374
1286F	Harry The Potter brute force, constructive algorithms, dp, fft, implementation, math	3100	x245
1270I	Xor on Figures constructive algorithms, fft, math	3500	x240
1257G	Divisor Set divide and conquer, fft, greedy, math, number theory	2600	x616
1251F	Red-White Fence combinatorics, fft	2500	x823
1218E	Product Tuples divide and conquer, fft	2500	x381
1218D	Xor Spanning Tree divide and conquer, fft, graphs	2400	x499
1184A3	Heidi Learns Hashing (Hard) fft, math, number theory	3100	x139
1119H	Triple fft, math	3200	x574
1119E	Pavel and Triangles brute force, dp, fft, greedy, ternary search	1900	x5032
1103E	Radix sum fft, math, number theory	3400	x234
1096G	Lucky Tickets divide and conquer, dp, fft	2400	x1499
1054H	Epic Convolution chinese remainder theorem, fft, math, number theory	3500	x178
1036E	Covered Points fft, geometry, number theory	2400	x1654
1033F	Boolean Computer bitmasks, brute force, fft, math	2800	x392
1010F	Tree fft, graphs, trees	3400	x218
993E	Nikita and Order Statistics chinese remainder theorem, fft, math	2300	x1428
986D	Perfect Encoding fft, math	3100	x332
981H	K Paths combinatorics, data structures, dp, fft, math	3100	x271
960G	Bandit Blues combinatorics, dp, fft, math	2900	x1072
958F3	Lightsabers (hard) fft	2600	x700
954I	Yet Another String Matching Problem fft, math	2200	x1027
923E	Perpetual Subtraction fft, math, matrices	3100	x453
914G	Sum the Fibonacci bitmasks, divide and conquer, dp, fft, math	2600	x931
901E	Cyclic Cipher fft, math	3300	x87
850E	Random Elections bitmasks, brute force, divide and conquer, fft, math	2800	x398
848E	Days of Floral Colours combinatorics, divide and conquer, dp, fft, math	3400	x212
827E	Rusty String fft, math, strings	2700	x967
773F	Test Data Generation combinatorics, divide and conquer, dp, fft, math, number theory	3400	x189
755G	PolandBall and Many Other Balls combinatorics, divide and conquer, dp, fft, math, number theory	3200	x917
754E	Dasha and cyclic table bitmasks, brute force, fft, strings, trees	2600	x500
715E	Complete the Permutations combinatorics, fft, graphs, math	3400	x356
662C	Binary Table bitmasks, brute force, divide and conquer, dp, fft, math	2600	x2024
632E	Thief in a Shop divide and conquer, dp, fft, math	2400	x2793
623E	Transforming Sequence combinatorics, dp, fft, math	3300	x549
553E	Kyoya and Train dp, fft, graphs, math, probabilities	3200	x556
528D	Fuzzy Search bitmasks, brute force, fft	2500	x2241
472G	Design Tutorial: Increase the Constraints bitmasks, data structures, fft	2800	x402
438E	The Child and Binary Tree combinatorics, divide and conquer, fft, number theory	3100	x1891
300D	Painting Square dp, fft	2300	x755
286E	Ladies' Shop constructive algorithms, fft, math	2800	x833