Problemset - Codeforces

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Codeforces Round 940 (Div. 2) and CodeCraft-23
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combinatorics

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Problems

#	Name
1930I	Counting Is Fun combinatorics	3500	x48
1654H	Three Minimums combinatorics, constructive algorithms, divide and conquer, dp, fft, math	3500	x68
1704H2	Game of AI (hard version) combinatorics, fft, math	3500	x72
1761F2	Anti-median (Hard Version) combinatorics, dp, math	3500	x75
1477F	Nezzar and Chocolate Bars combinatorics, fft, math, probabilities	3500	x120
1696H	Maximum Product? brute force, combinatorics, dp, greedy, implementation, math, two pointers	3500	x141
1586I	Omkar and Mosaic combinatorics, constructive algorithms, math	3500	x154
1893E	Cacti Symphony combinatorics, dfs and similar, dp, graphs	3500	x161
1835E	Old Mobile combinatorics, dp, probabilities	3500	x196
1687E	Become Big For Me combinatorics, constructive algorithms, greedy, math, number theory	3500	x210
1336E2	Chiori and Doll Picking (hard version) bitmasks, brute force, combinatorics, math	3500	x280
1292F	Nora's Toy Boxes bitmasks, combinatorics, dp	3500	x295
1280F	Intergalactic Sliding Puzzle combinatorics, constructive algorithms, math	3400	x55
1844H	Multiple of Three Cycles combinatorics, data structures, dp, dsu, math	3400	x126
804F	Fake bullions combinatorics, dfs and similar, dp, graphs, number theory	3400	x136
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	x194
848E	Days of Floral Colours combinatorics, divide and conquer, dp, fft, math	3400	x198
914H	Ember and Storm's Tree Game combinatorics, dp, games, trees	3400	x225
794G	Replace All combinatorics, dp, math	3400	x318
715E	Complete the Permutations combinatorics, fft, graphs, math	3400	x340
1580F	Problems for Codeforces combinatorics, fft, math	3300	x129
865G	Flowers and Chocolate combinatorics, math, matrices	3300	x129
1450H2	Multithreading (Hard Version) combinatorics, implementation, math	3300	x161
1641E	Special Positions combinatorics, divide and conquer, fft, math	3300	x200
1750G	Doping combinatorics, dp, math	3300	x222
1188E	Problem from Red Panda combinatorics	3300	x223
1466H	Finding satisfactory solutions combinatorics, dp, graphs, greedy, math	3300	x255
1254E	Send Tree to Charlie combinatorics, dfs and similar, dsu, trees	3300	x258
1528F	AmShZ Farm combinatorics, fft, math	3300	x271
1726G	A Certain Magical Party combinatorics, data structures, greedy, sortings	3300	x278
878E	Numbers on the blackboard combinatorics, dp	3300	x470
623E	Transforming Sequence combinatorics, dp, fft, math	3300	x525
1403C	Chess Rush *special problem, combinatorics, dp, implementation, math	3200	x42
756E	Byteland coins combinatorics, dp, math	3200	x149
1704H1	Game of AI (easy version) combinatorics, constructive algorithms, dp, fft, math	3200	x168
1470E	Strange Permutation binary search, combinatorics, data structures, dp, graphs, implementation, two pointers	3200	x289
1774G	Segment Covering brute force, combinatorics, constructive algorithms, data structures, dp, trees	3200	x357
1603E	A Perfect Problem combinatorics, dp, math	3200	x393
1517F	Reunion combinatorics, dp, trees	3200	x434
750G	New Year and Binary Tree Paths bitmasks, brute force, combinatorics, dp	3200	x438
1608F	MEX counting combinatorics, dp, implementation	3200	x513
755G	PolandBall and Many Other Balls combinatorics, divide and conquer, dp, fft, math, number theory	3200	x845
1954F	Unique Strings combinatorics, dp, math	3100	x139
1951G	Clacking Balls combinatorics, math, probabilities	3100	x188
1864G	Magic Square combinatorics, constructive algorithms, implementation	3100	x250
1205E	Expected Value Again combinatorics, strings	3100	x261
981H	K Paths combinatorics, data structures, dp, fft, math	3100	x262
1784E	Infinite Game brute force, combinatorics, dp, games, probabilities	3100	x297
1439D	INOI Final Contests combinatorics, dp, fft	3100	x336
1924E	Paper Cutting Again combinatorics, probabilities	3100	x380
653G	Move by Prime combinatorics, math, number theory	3100	x511
1503E	2-Coloring combinatorics, dp, math	3100	x587
1770F	Koxia and Sequence bitmasks, combinatorics, dp, math, number theory	3100	x591
438E	The Child and Binary Tree combinatorics, divide and conquer, fft, number theory	3100	x1769
372E	Drawing Circles is Fun combinatorics, geometry	3000	x168
1743G	Antifibonacci Cut bitmasks, combinatorics, constructive algorithms, data structures, dp, hashing, math	3000	x241
135E	Weak Subsequence combinatorics	3000	x261
1299D	Around the World bitmasks, combinatorics, dfs and similar, dp, graphs, graphs, math, trees	3000	x409
698F	Coprime Permutation combinatorics, number theory	3000	x427
1707D	Partial Virtual Trees combinatorics, dfs and similar, dp, math, trees	3000	x573
1667E	Centroid Probabilities combinatorics, dp, fft, math	3000	x617
1097G	Vladislav and a Great Legend combinatorics, dp, trees	3000	x652
1392H	ZS Shuffles Cards combinatorics, dp, math, probabilities	3000	x666
506E	Mr. Kitayuta's Gift combinatorics, dp, matrices, strings	3000	x678
1616H	Keep XOR Low bitmasks, combinatorics, data structures, divide and conquer, dp, math	3000	x768
891E	Lust combinatorics, math, matrices	3000	x837
1810H	Last Number combinatorics, math	2900	x128
1928F	Digital Patterns combinatorics, data structures, implementation, math	2900	x201
145D	Lucky Pair combinatorics, data structures, implementation	2900	x236
217D	Bitonix' Patrol bitmasks, brute force, combinatorics, dfs and similar, math	2900	x241
933D	A Creative Cutout brute force, combinatorics, math	2900	x278
1605F	PalindORme combinatorics, dp	2900	x283
1644F	Basis combinatorics, fft, math, number theory	2900	x309
1847E	Triangle Platinum? brute force, combinatorics, implementation, interactive, math, probabilities	2900	x311
776G	Sherlock and the Encrypted Data bitmasks, combinatorics, dp	2900	x326
717A	Festival Organization combinatorics, math, number theory	2900	x330
848D	Shake It! combinatorics, dp, flows, graphs	2900	x359
917C	Pollywog combinatorics, dp, matrices	2900	x369
1792F2	Graph Coloring (hard version) brute force, combinatorics, divide and conquer, dp, fft, graphs	2900	x370
1450H1	Multithreading (Easy Version) combinatorics, fft, math	2900	x372
1630E	Expected Components combinatorics, math, number theory, probabilities	2900	x417
997D	Cycles in product combinatorics, divide and conquer, trees	2900	x423
1747E	List Generation combinatorics, dp, math	2900	x480
1528E	Mashtali and Hagh Trees combinatorics, dp, trees	2900	x500
1713F	Lost Array bitmasks, combinatorics, constructive algorithms, dp, math	2900	x503
1085G	Beautiful Matrix combinatorics, data structures, dp	2900	x504
896D	Nephren Runs a Cinema chinese remainder theorem, combinatorics, math, number theory	2900	x515
1221G	Graph And Numbers bitmasks, brute force, combinatorics, dp, meet-in-the-middle	2900	x517
1060F	Shrinking Tree combinatorics, dp	2900	x522
722E	Research Rover combinatorics, dp	2900	x796
1264D2	Beautiful Bracket Sequence (hard version) combinatorics, probabilities	2900	x837
960G	Bandit Blues combinatorics, dp, fft, math	2900	x1021
585E	Present for Vitalik the Philatelist combinatorics, math, number theory	2900	x1039
1285F	Classical? binary search, combinatorics, number theory	2900	x1057
1488H	Build From Suffixes *special problem, combinatorics, data structures	2800	x52
1725I	Imitating the Key Tree combinatorics, dsu, trees	2800	x181
1773G	Game of Questions bitmasks, combinatorics, dp, fft, math, probabilities	2800	x317
1942G	Bessie and Cards combinatorics, dp, math	2800	x333
762F	Tree nesting combinatorics, graphs, trees	2800	x344

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