Problemset - Codeforces

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Codeforces Round (Div. 2)
5 days

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Problems

#	Name
1488J	Flower Shop *special problem, data structures, fft, math	3100	x31
1654H	Three Minimums combinatorics, constructive algorithms, divide and conquer, dp, fft, math	3500	x68
1909I	Short Permutation Problem combinatorics, dp, fft, math	1900	x71
1704H2	Game of AI (hard version) combinatorics, fft, math	3500	x72
1896H1	Cyclic Hamming (Easy Version) brute force, divide and conquer, dp, fft, math, number theory	3400	x76
1687F	Koishi's Unconscious Permutation fft, math	3500	x76
1896H2	Cyclic Hamming (Hard Version) brute force, dp, fft, math, number theory	3500	x83
901E	Cyclic Cipher fft, math	3300	x83
1936E	Yet Yet Another Permutation Problem divide and conquer, fft, math	3400	x88
1704G	Mio and Lucky Array constructive algorithms, fft, math, strings	3500	x95
1349F2	Slime and Sequences (Hard Version) dp, fft, math	3500	x107
1477F	Nezzar and Chocolate Bars combinatorics, fft, math, probabilities	3500	x120
1580F	Problems for Codeforces combinatorics, fft, math	3300	x129
1184A3	Heidi Learns Hashing (Hard) fft, math, number theory	3100	x135
1770G	Koxia and Bracket divide and conquer, fft, math	3400	x145
1575C	Cyclic Sum data structures, fft, number theory	3000	x152
1704H1	Game of AI (easy version) combinatorics, constructive algorithms, dp, fft, math	3200	x168
1054H	Epic Convolution chinese remainder theorem, fft, math, number theory	3500	x170
1479E	School Clubs dp, fft, math, number theory, probabilities	3500	x179
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	x192
848E	Days of Floral Colours combinatorics, divide and conquer, dp, fft, math	3400	x198
1641E	Special Positions combinatorics, divide and conquer, fft, math	3300	x200
1392I	Kevin and Grid fft, graphs, math	3300	x201
1010F	Tree fft, graphs, trees	3400	x205
1103E	Radix sum fft, math, number theory	3400	x212
1270I	Xor on Figures constructive algorithms, fft, math	3500	x225
1286F	Harry The Potter brute force, constructive algorithms, dp, fft, implementation, math	3100	x230
981H	K Paths combinatorics, data structures, dp, fft, math	3100	x259
1528F	AmShZ Farm combinatorics, fft, math	3300	x271
1644F	Basis combinatorics, fft, math, number theory	2900	x309
1218D	Xor Spanning Tree divide and conquer, fft, graphs	2400	x310
1671F	Permutation Counting brute force, combinatorics, dp, fft, math	2700	x313
1773G	Game of Questions bitmasks, combinatorics, dp, fft, math, probabilities	2800	x317
986D	Perfect Encoding fft, math	3100	x318
1439D	INOI Final Contests combinatorics, dp, fft	3100	x336
715E	Complete the Permutations combinatorics, fft, graphs, math	3400	x338
1845F	Swimmers in the Pool dp, fft, math, number theory	2800	x346
1334G	Substring Search bitmasks, brute force, fft	2900	x352
1218E	Product Tuples divide and conquer, fft	2500	x354
1033F	Boolean Computer bitmasks, brute force, fft, math	2800	x363
1792F2	Graph Coloring (hard version) brute force, combinatorics, divide and conquer, dp, fft, graphs	2900	x370
1450H1	Multithreading (Easy Version) combinatorics, fft, math	2900	x371
1473G	Tiles combinatorics, dp, fft, math	2800	x377
850E	Random Elections bitmasks, brute force, divide and conquer, fft, math	2800	x377
472G	Design Tutorial: Increase the Constraints bitmasks, data structures, fft	2800	x388
1349F1	Slime and Sequences (Easy Version) dp, fft, math	3100	x393
923E	Perpetual Subtraction fft, math, matrices	3100	x431
754E	Dasha and cyclic table bitmasks, brute force, fft, strings, trees	2600	x478
1119H	Triple fft, math	3200	x504
1709F	Multiset of Strings bitmasks, brute force, dp, fft, flows, graphs, math, meet-in-the-middle, trees	2500	x522
623E	Transforming Sequence combinatorics, dp, fft, math	3300	x522
553E	Kyoya and Train dp, fft, graphs, math, probabilities	3200	x526
1257G	Divisor Set divide and conquer, fft, greedy, math, number theory	2600	x566
1574F	Occurrences combinatorics, dfs and similar, dp, dsu, fft, graphs	2700	x569
1487G	String Counting combinatorics, dp, fft, math	2700	x571
1667E	Centroid Probabilities combinatorics, dp, fft, math	3000	x614
958F3	Lightsabers (hard) fft	2600	x649
1731F	Function Sum brute force, combinatorics, dp, fft, math	2500	x651
1613F	Tree Coloring combinatorics, divide and conquer, fft	2600	x658
1821F	Timber combinatorics, dp, fft, math	2600	x693
300D	Painting Square dp, fft	2300	x726
1398G	Running Competition bitmasks, fft, math, number theory	2600	x754
827E	Rusty String fft, math, strings	2700	x785
1251F	Red-White Fence combinatorics, fft	2500	x795
1542E2	Abnormal Permutation Pairs (hard version) combinatorics, dp, fft, math	2700	x797
286E	Ladies' Shop constructive algorithms, fft, math	2800	x817
755G	PolandBall and Many Other Balls combinatorics, divide and conquer, dp, fft, math, number theory	3200	x845
914G	Sum the Fibonacci bitmasks, divide and conquer, dp, fft, math	2600	x890
1536F	Omkar and Akmar chinese remainder theorem, combinatorics, constructive algorithms, fft, games, geometry, math, meet-in-the-middle, string suffix structures	2600	x907
1408G	Clusterization Counting combinatorics, dp, dsu, fft, graphs, trees	2700	x917
954I	Yet Another String Matching Problem fft, math	2200	x955
960G	Bandit Blues combinatorics, dp, fft, math	2900	x1019
1542E1	Abnormal Permutation Pairs (easy version) combinatorics, dp, fft, math	2400	x1177
1856E2	PermuTree (hard version) bitmasks, dfs and similar, dp, fft, greedy, implementation, math, trees	2700	x1294
993E	Nikita and Order Statistics chinese remainder theorem, fft, math	2300	x1329
1726E	Almost Perfect combinatorics, fft, math	2400	x1333
1608D	Dominoes combinatorics, fft, graphs, math, number theory	2400	x1343
1096G	Lucky Tickets divide and conquer, dp, fft	2400	x1362
1036E	Covered Points fft, geometry, number theory	2400	x1401
1548C	The Three Little Pigs combinatorics, dp, fft, math	2500	x1729
438E	The Child and Binary Tree combinatorics, divide and conquer, fft, number theory	3100	x1769
662C	Binary Table bitmasks, brute force, divide and conquer, dp, fft, math	2600	x1934
528D	Fuzzy Search bitmasks, brute force, fft	2500	x2039
1559E	Mocha and Stars combinatorics, dp, fft, math, number theory	2200	x2208
632E	Thief in a Shop divide and conquer, dp, fft, math	2400	x2534
1342E	Placing Rooks combinatorics, fft, math	2300	x2798
1119E	Pavel and Triangles brute force, dp, fft, greedy, ternary search	1900	x4732
1438C	Engineer Artem 2-sat, chinese remainder theorem, constructive algorithms, fft, flows	2000	x10122