Problemset - Codeforces

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Codeforces Round 946 (Div. 3)
3 days
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Problems

#	Name
1967E1	Again Counting Arrays (Easy Version) combinatorics, dp, fft, math	3100	x119
1936E	Yet Yet Another Permutation Problem divide and conquer, fft, math	3400	x96
1909I	Short Permutation Problem combinatorics, dp, fft, math	1900	x76
1896H2	Cyclic Hamming (Hard Version) brute force, dp, fft, math, number theory	3500	x88
1896H1	Cyclic Hamming (Easy Version) brute force, divide and conquer, dp, fft, math, number theory	3400	x79
1856E2	PermuTree (hard version) bitmasks, dfs and similar, dp, fft, greedy, implementation, math, trees	2700	x1317
1845F	Swimmers in the Pool dp, fft, math, number theory	2800	x354
1821F	Timber combinatorics, dp, fft, math	2600	x707
1792F2	Graph Coloring (hard version) brute force, combinatorics, divide and conquer, dp, fft, graphs	2900	x373
1773G	Game of Questions bitmasks, combinatorics, dp, fft, math, probabilities	2800	x321
1770G	Koxia and Bracket divide and conquer, fft, math	3400	x152
1731F	Function Sum brute force, combinatorics, dp, fft, math	2500	x660
1726E	Almost Perfect combinatorics, fft, math	2400	x1358
1709F	Multiset of Strings bitmasks, brute force, dp, fft, flows, graphs, math, meet-in-the-middle, trees	2500	x535
1704H2	Game of AI (hard version) combinatorics, fft, math	3500	x76
1704H1	Game of AI (easy version) combinatorics, constructive algorithms, dp, fft, math	3200	x170
1704G	Mio and Lucky Array constructive algorithms, fft, math, strings	3500	x98
1687F	Koishi's Unconscious Permutation fft, math	3500	x77
1671F	Permutation Counting brute force, combinatorics, dp, fft, math	2700	x316
1667E	Centroid Probabilities combinatorics, dp, fft, math	3000	x625
1654H	Three Minimums combinatorics, constructive algorithms, divide and conquer, dp, fft, math	3500	x70
1644F	Basis combinatorics, fft, math, number theory	2900	x314
1641E	Special Positions combinatorics, divide and conquer, fft, math	3300	x203
1613F	Tree Coloring combinatorics, divide and conquer, fft	2600	x667
1608D	Dominoes combinatorics, fft, graphs, math, number theory	2400	x1350
1580F	Problems for Codeforces combinatorics, fft, math	3300	x130
1575C	Cyclic Sum data structures, fft, number theory	3000	x155
1574F	Occurrences combinatorics, dfs and similar, dp, dsu, fft, graphs	2700	x586
1559E	Mocha and Stars combinatorics, dp, fft, math, number theory	2200	x2217
1553I	Stairs combinatorics, divide and conquer, dp, fft, math	3400	x195
1548C	The Three Little Pigs combinatorics, dp, fft, math	2500	x1737
1542E2	Abnormal Permutation Pairs (hard version) combinatorics, dp, fft, math	2700	x809
1542E1	Abnormal Permutation Pairs (easy version) combinatorics, dp, fft, math	2400	x1187
1536F	Omkar and Akmar chinese remainder theorem, combinatorics, constructive algorithms, fft, games, geometry, math, meet-in-the-middle, string suffix structures	2600	x913
1528F	AmShZ Farm combinatorics, fft, math	3300	x275
1488J	Flower Shop *special problem, data structures, fft, math	3100	x31
1487G	String Counting combinatorics, dp, fft, math	2700	x575
1479E	School Clubs dp, fft, math, number theory, probabilities	3500	x188
1477F	Nezzar and Chocolate Bars combinatorics, fft, math, probabilities	3500	x123
1473G	Tiles combinatorics, dp, fft, math	2800	x382
1450H1	Multithreading (Easy Version) combinatorics, fft, math	2900	x375
1439D	INOI Final Contests combinatorics, dp, fft	3100	x340
1438C	Engineer Artem 2-sat, chinese remainder theorem, constructive algorithms, fft, flows	2000	x10179
1408G	Clusterization Counting combinatorics, dp, dsu, fft, graphs, trees	2700	x927
1398G	Running Competition bitmasks, fft, math, number theory	2600	x773
1392I	Kevin and Grid fft, graphs, math	3300	x203
1349F2	Slime and Sequences (Hard Version) dp, fft, math	3500	x107
1349F1	Slime and Sequences (Easy Version) dp, fft, math	3100	x397
1342E	Placing Rooks combinatorics, fft, math	2300	x2817
1334G	Substring Search bitmasks, brute force, fft	2900	x353
1286F	Harry The Potter brute force, constructive algorithms, dp, fft, implementation, math	3100	x235
1270I	Xor on Figures constructive algorithms, fft, math	3500	x228
1257G	Divisor Set divide and conquer, fft, greedy, math, number theory	2600	x579
1251F	Red-White Fence combinatorics, fft	2500	x801
1218E	Product Tuples divide and conquer, fft	2500	x359
1218D	Xor Spanning Tree divide and conquer, fft, graphs	2400	x313
1184A3	Heidi Learns Hashing (Hard) fft, math, number theory	3100	x137
1119H	Triple fft, math	3200	x516
1119E	Pavel and Triangles brute force, dp, fft, greedy, ternary search	1900	x4894
1103E	Radix sum fft, math, number theory	3400	x220
1096G	Lucky Tickets divide and conquer, dp, fft	2400	x1383
1054H	Epic Convolution chinese remainder theorem, fft, math, number theory	3500	x174
1036E	Covered Points fft, geometry, number theory	2400	x1415
1033F	Boolean Computer bitmasks, brute force, fft, math	2800	x364
1010F	Tree fft, graphs, trees	3400	x211
993E	Nikita and Order Statistics chinese remainder theorem, fft, math	2300	x1363
986D	Perfect Encoding fft, math	3100	x324
981H	K Paths combinatorics, data structures, dp, fft, math	3100	x265
960G	Bandit Blues combinatorics, dp, fft, math	2900	x1033
958F3	Lightsabers (hard) fft	2600	x665
954I	Yet Another String Matching Problem fft, math	2200	x970
923E	Perpetual Subtraction fft, math, matrices	3100	x435
914G	Sum the Fibonacci bitmasks, divide and conquer, dp, fft, math	2600	x897
901E	Cyclic Cipher fft, math	3300	x84
850E	Random Elections bitmasks, brute force, divide and conquer, fft, math	2800	x380
848E	Days of Floral Colours combinatorics, divide and conquer, dp, fft, math	3400	x201
827E	Rusty String fft, math, strings	2700	x792
773F	Test Data Generation combinatorics, divide and conquer, dp, fft, math, number theory	3400	x184
755G	PolandBall and Many Other Balls combinatorics, divide and conquer, dp, fft, math, number theory	3200	x860
754E	Dasha and cyclic table bitmasks, brute force, fft, strings, trees	2600	x481
715E	Complete the Permutations combinatorics, fft, graphs, math	3400	x344
662C	Binary Table bitmasks, brute force, divide and conquer, dp, fft, math	2600	x1959
632E	Thief in a Shop divide and conquer, dp, fft, math	2400	x2581
623E	Transforming Sequence combinatorics, dp, fft, math	3300	x533
553E	Kyoya and Train dp, fft, graphs, math, probabilities	3200	x536
528D	Fuzzy Search bitmasks, brute force, fft	2500	x2070
472G	Design Tutorial: Increase the Constraints bitmasks, data structures, fft	2800	x393
438E	The Child and Binary Tree combinatorics, divide and conquer, fft, number theory	3100	x1793
300D	Painting Square dp, fft	2300	x738
286E	Ladies' Shop constructive algorithms, fft, math	2800	x818