Problemset - Codeforces

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Codeforces Round (Div. 2)
7 days

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Problems

#	Name
1975G	Zimpha Fan Club fft, greedy, math, strings	3000	x193
1967E1	Again Counting Arrays (Easy Version) combinatorics, dp, fft, math	3100	x164
1936E	Yet Yet Another Permutation Problem divide and conquer, fft, math	3400	x101
1909I	Short Permutation Problem combinatorics, dp, fft, math	1900	x103
1896H2	Cyclic Hamming (Hard Version) brute force, dp, fft, math, number theory	3500	x98
1896H1	Cyclic Hamming (Easy Version) brute force, divide and conquer, dp, fft, math, number theory	3400	x87
1856E2	PermuTree (hard version) bitmasks, dfs and similar, dp, fft, greedy, implementation, math, trees	2700	x1335
1845F	Swimmers in the Pool dp, fft, math, number theory	2800	x359
1821F	Timber combinatorics, dp, fft, math	2600	x723
1792F2	Graph Coloring (hard version) brute force, combinatorics, divide and conquer, dp, fft, graphs	2900	x375
1773G	Game of Questions bitmasks, combinatorics, dp, fft, math, probabilities	2800	x325
1770G	Koxia and Bracket divide and conquer, fft, math	3400	x158
1731F	Function Sum brute force, combinatorics, dp, fft, math	2500	x667
1726E	Almost Perfect combinatorics, fft, math	2400	x1368
1709F	Multiset of Strings bitmasks, brute force, dp, fft, flows, graphs, math, meet-in-the-middle, trees	2500	x538
1704H2	Game of AI (hard version) combinatorics, fft, math	3500	x79
1704H1	Game of AI (easy version) combinatorics, constructive algorithms, dp, fft, math	3200	x174
1704G	Mio and Lucky Array constructive algorithms, fft, math, strings	3500	x99
1687F	Koishi's Unconscious Permutation fft, math	3500	x80
1671F	Permutation Counting brute force, combinatorics, dp, fft, math	2700	x318
1667E	Centroid Probabilities combinatorics, dp, fft, math	3000	x634
1654H	Three Minimums combinatorics, constructive algorithms, divide and conquer, dp, fft, math	3500	x71
1644F	Basis combinatorics, fft, math, number theory	2900	x317
1641E	Special Positions combinatorics, divide and conquer, fft, math	3300	x205
1613F	Tree Coloring combinatorics, divide and conquer, fft	2600	x672
1608D	Dominoes combinatorics, fft, graphs, math, number theory	2400	x1358
1580F	Problems for Codeforces combinatorics, fft, math	3300	x131
1575C	Cyclic Sum data structures, fft, number theory	3000	x158
1574F	Occurrences combinatorics, dfs and similar, dp, dsu, fft, graphs	2700	x596
1559E	Mocha and Stars combinatorics, dp, fft, math, number theory	2200	x2240
1553I	Stairs combinatorics, divide and conquer, dp, fft, math	3400	x198
1548C	The Three Little Pigs combinatorics, dp, fft, math	2500	x1767
1542E2	Abnormal Permutation Pairs (hard version) combinatorics, dp, fft, math	2700	x823
1542E1	Abnormal Permutation Pairs (easy version) combinatorics, dp, fft, math	2400	x1206
1536F	Omkar and Akmar chinese remainder theorem, combinatorics, constructive algorithms, fft, games, geometry, math, meet-in-the-middle, string suffix structures	2600	x920
1528F	AmShZ Farm combinatorics, fft, math	3300	x280
1488J	Flower Shop *special problem, data structures, fft, math	3100	x34
1487G	String Counting combinatorics, dp, fft, math	2700	x580
1479E	School Clubs dp, fft, math, number theory, probabilities	3500	x199
1477F	Nezzar and Chocolate Bars combinatorics, fft, math, probabilities	3500	x125
1473G	Tiles combinatorics, dp, fft, math	2800	x385
1450H1	Multithreading (Easy Version) combinatorics, fft, math	2900	x383
1439D	INOI Final Contests combinatorics, dp, fft	3100	x351
1438C	Engineer Artem 2-sat, chinese remainder theorem, constructive algorithms, fft, flows	2000	x10266
1408G	Clusterization Counting combinatorics, dp, dsu, fft, graphs, trees	2700	x935
1398G	Running Competition bitmasks, fft, math, number theory	2600	x782
1392I	Kevin and Grid fft, graphs, math	3300	x204
1349F2	Slime and Sequences (Hard Version) dp, fft, math	3500	x108
1349F1	Slime and Sequences (Easy Version) dp, fft, math	3100	x404
1342E	Placing Rooks combinatorics, fft, math	2300	x3012
1334G	Substring Search bitmasks, brute force, fft	2900	x357
1286F	Harry The Potter brute force, constructive algorithms, dp, fft, implementation, math	3100	x242
1270I	Xor on Figures constructive algorithms, fft, math	3500	x231
1257G	Divisor Set divide and conquer, fft, greedy, math, number theory	2600	x584
1251F	Red-White Fence combinatorics, fft	2500	x803
1218E	Product Tuples divide and conquer, fft	2500	x361
1218D	Xor Spanning Tree divide and conquer, fft, graphs	2400	x362
1184A3	Heidi Learns Hashing (Hard) fft, math, number theory	3100	x139
1119H	Triple fft, math	3200	x532
1119E	Pavel and Triangles brute force, dp, fft, greedy, ternary search	1900	x4921
1103E	Radix sum fft, math, number theory	3400	x222
1096G	Lucky Tickets divide and conquer, dp, fft	2400	x1411
1054H	Epic Convolution chinese remainder theorem, fft, math, number theory	3500	x176
1036E	Covered Points fft, geometry, number theory	2400	x1471
1033F	Boolean Computer bitmasks, brute force, fft, math	2800	x368
1010F	Tree fft, graphs, trees	3400	x212
993E	Nikita and Order Statistics chinese remainder theorem, fft, math	2300	x1373
986D	Perfect Encoding fft, math	3100	x326
981H	K Paths combinatorics, data structures, dp, fft, math	3100	x268
960G	Bandit Blues combinatorics, dp, fft, math	2900	x1044
958F3	Lightsabers (hard) fft	2600	x673
954I	Yet Another String Matching Problem fft, math	2200	x986
923E	Perpetual Subtraction fft, math, matrices	3100	x443
914G	Sum the Fibonacci bitmasks, divide and conquer, dp, fft, math	2600	x903
901E	Cyclic Cipher fft, math	3300	x85
850E	Random Elections bitmasks, brute force, divide and conquer, fft, math	2800	x382
848E	Days of Floral Colours combinatorics, divide and conquer, dp, fft, math	3400	x202
827E	Rusty String fft, math, strings	2700	x801
773F	Test Data Generation combinatorics, divide and conquer, dp, fft, math, number theory	3400	x185
755G	PolandBall and Many Other Balls combinatorics, divide and conquer, dp, fft, math, number theory	3200	x888
754E	Dasha and cyclic table bitmasks, brute force, fft, strings, trees	2600	x486
715E	Complete the Permutations combinatorics, fft, graphs, math	3400	x349
662C	Binary Table bitmasks, brute force, divide and conquer, dp, fft, math	2600	x1972
632E	Thief in a Shop divide and conquer, dp, fft, math	2400	x2632
623E	Transforming Sequence combinatorics, dp, fft, math	3300	x540
553E	Kyoya and Train dp, fft, graphs, math, probabilities	3200	x542
528D	Fuzzy Search bitmasks, brute force, fft	2500	x2096
472G	Design Tutorial: Increase the Constraints bitmasks, data structures, fft	2800	x394
438E	The Child and Binary Tree combinatorics, divide and conquer, fft, number theory	3100	x1821
300D	Painting Square dp, fft	2300	x741
286E	Ladies' Shop constructive algorithms, fft, math	2800	x822