Problemset - Codeforces

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combinatorics

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Problems

#	Name
997D	Cycles in product combinatorics, divide and conquer, trees	2900	x424
698F	Coprime Permutation combinatorics, number theory	3000	x429
1725E	Electrical Efficiency combinatorics, data structures, dp, math, number theory, trees	2500	x432
306C	White, Black and White Again combinatorics, number theory	2100	x437
1517F	Reunion combinatorics, dp, trees	3200	x438
750G	New Year and Binary Tree Paths bitmasks, brute force, combinatorics, dp	3200	x440
229E	Gifts combinatorics, dp, math, probabilities	2600	x450
305D	Olya and Graph combinatorics, math	2200	x453
985G	Team Players combinatorics	2700	x457
833C	Ever-Hungry Krakozyabra brute force, combinatorics, greedy, math	2700	x460
176C	Playing with Superglue combinatorics, constructive algorithms	2000	x464
878E	Numbers on the blackboard combinatorics, dp	3300	x472
1747E	List Generation combinatorics, dp, math	2900	x484
1651E	Sum of Matchings brute force, combinatorics, constructive algorithms, dfs and similar, graph matchings, greedy, math	2600	x494
1436F	Sum Over Subsets combinatorics, math, number theory	2800	x496
1916H2	Matrix Rank (Hard Version) combinatorics, dp, math, matrices, string suffix structures	2700	x502
1528E	Mashtali and Hagh Trees combinatorics, dp, trees	2900	x503
1085G	Beautiful Matrix combinatorics, data structures, dp	2900	x506
1713F	Lost Array bitmasks, combinatorics, constructive algorithms, dp, math	2900	x508
1118F2	Tree Cutting (Hard Version) combinatorics, dfs and similar, dp, trees	2700	x510
653G	Move by Prime combinatorics, math, number theory	3100	x515
896D	Nephren Runs a Cinema chinese remainder theorem, combinatorics, math, number theory	2900	x516
1608F	MEX counting combinatorics, dp, implementation	3200	x518
1221G	Graph And Numbers bitmasks, brute force, combinatorics, dp, meet-in-the-middle	2900	x519
482D	Random Function and Tree combinatorics, dp, trees	2700	x520
856C	Eleventh Birthday combinatorics, dp, math	2400	x523
946F	Fibonacci String Subsequences combinatorics, dp, matrices	2400	x529
623E	Transforming Sequence combinatorics, dp, fft, math	3300	x533
1060F	Shrinking Tree combinatorics, dp	2900	x534
215E	Periodical Numbers combinatorics, dp, number theory	2100	x538
852F	Product transformation combinatorics, math, number theory	2200	x542
954H	Path Counting combinatorics, dp	2500	x553
1863G	Swaps combinatorics, dp, graphs, math	2800	x556
15E	Triangles combinatorics, dp	2600	x556
1487G	String Counting combinatorics, dp, fft, math	2700	x575
392C	Yet Another Number Sequence combinatorics, math, matrices		x576
1707D	Partial Virtual Trees combinatorics, dfs and similar, dp, math, trees	3000	x582
1916H1	Matrix Rank (Easy Version) brute force, combinatorics, dp, math, matrices	2700	x584
1545C	AquaMoon and Permutations 2-sat, brute force, combinatorics, constructive algorithms, graph matchings, graphs	2800	x584
1574F	Occurrences combinatorics, dfs and similar, dp, dsu, fft, graphs	2700	x585
123C	Brackets combinatorics, dp, greedy	2300	x588
1943D2	Counting Is Fun (Hard Version) combinatorics, dp	2800	x589
1503E	2-Coloring combinatorics, dp, math	3100	x592
815D	Karen and Cards binary search, combinatorics, data structures, geometry	2800	x595
1906H	Twin Friends combinatorics, dp	2200	x603
1762E	Tree Sum combinatorics, math, trees	2600	x606
1770F	Koxia and Sequence bitmasks, combinatorics, dp, math, number theory	3100	x613
1730E	Maximums and Minimums combinatorics, data structures, divide and conquer, number theory	2700	x615
1486F	Pairs of Paths combinatorics, data structures, dfs and similar, dp, trees	2600	x621
1667E	Centroid Probabilities combinatorics, dp, fft, math	3000	x623
1895F	Fancy Arrays combinatorics, dp, math, matrices	2600	x625
1906J	Count BFS Graph combinatorics, dp	2100	x630
295D	Greg and Caves combinatorics, dp	2400	x634
814E	An unavoidable detour for home combinatorics, dp, graphs, shortest paths	2600	x640
1808E2	Minibuses on Venus (medium version) combinatorics, divide and conquer, dp, matrices	2500	x646
1336E1	Chiori and Doll Picking (easy version) bitmasks, brute force, combinatorics, math	2700	x647
40E	Number Table combinatorics	2500	x654
1731F	Function Sum brute force, combinatorics, dp, fft, math	2500	x658
1673E	Power or XOR? bitmasks, combinatorics, math, number theory	2500	x660
1097G	Vladislav and a Great Legend combinatorics, dp, trees	3000	x662
1613F	Tree Coloring combinatorics, divide and conquer, fft	2600	x665
1792F1	Graph Coloring (easy version) combinatorics, dp, graphs	2700	x667
1392H	ZS Shuffles Cards combinatorics, dp, math, probabilities	3000	x668
288D	Polo the Penguin and Trees combinatorics, dfs and similar, trees	2400	x674
506E	Mr. Kitayuta's Gift combinatorics, dp, matrices, strings	3000	x685
1866M	Mighty Rock Tower brute force, combinatorics, dp, math, probabilities	2400	x687
1662N	Drone Photo combinatorics, math, sortings		x688
1799G	Count Voting combinatorics, dp, math	2600	x697
1821F	Timber combinatorics, dp, fft, math	2600	x704
1626F	A Random Code Problem combinatorics, dp, math, number theory, probabilities	2800	x706
1185G2	Playlist for Polycarp (hard version) combinatorics, dp	2600	x708
283E	Cow Tennis Tournament combinatorics, data structures, math	2800	x716
111D	Petya and Coloring combinatorics, dp	2300	x716
501E	Misha and Palindrome Degree binary search, combinatorics, implementation	2500	x718
323A	Black-and-White Cube combinatorics, constructive algorithms	1600	x719
809C	Find a car combinatorics, divide and conquer, dp	2600	x726
1781F	Bracket Insertion combinatorics, dp, math, trees	2700	x732
908E	New Year and Entity Enumeration bitmasks, combinatorics, dp, math	2500	x733
837F	Prefix Sums binary search, brute force, combinatorics, math, matrices	2400	x738
235E	Number Challenge combinatorics, dp, implementation, math, number theory	2600	x741
26D	Tickets combinatorics, math, probabilities	2400	x745
1615F	LEGOndary Grandmaster combinatorics, dp, math	2800	x747
1383E	Strange Operation combinatorics, data structures, dp	2800	x749
325E	The Red Button combinatorics, dfs and similar, dsu, graphs, greedy	2800	x749
1530F	Bingo bitmasks, combinatorics, dp, math, probabilities	2600	x752
645F	Cowslip Collections combinatorics, math, number theory	2500	x757
1740F	Conditional Mix combinatorics, dp, math	2600	x758
1153F	Serval and Bonus Problem combinatorics, dp, math, probabilities	2600	x760
666C	Codeword combinatorics, strings	2500	x765
1924D	Balanced Subsequences combinatorics, dp, math	2700	x770
293B	Distinct Paths brute force, combinatorics	2700	x772
1919E	Counting Prefixes combinatorics, constructive algorithms, dp, implementation, math	2600	x773
1758E	Tick, Tock combinatorics, dfs and similar, dsu, graphs	2500	x779
1616H	Keep XOR Low bitmasks, combinatorics, data structures, divide and conquer, dp, math	3000	x789
722E	Research Rover combinatorics, dp	2900	x798
1251F	Red-White Fence combinatorics, fft	2500	x800
1425D	Danger of Mad Snakes combinatorics, dp, math	2300	x803
830D	Singer House combinatorics, dp, graphs, trees	2800	x804
1542E2	Abnormal Permutation Pairs (hard version) combinatorics, dp, fft, math	2700	x805
1876D	Lexichromatography combinatorics, dfs and similar, dsu, graphs, two pointers	2500	x811