Problemset - Codeforces

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combinatorics

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Problems

#	Name
1105C	Ayoub and Lost Array combinatorics, dp, math	1500	x10239
1102E	Monotonic Renumeration combinatorics, sortings	1700	x5781
1097G	Vladislav and a Great Legend combinatorics, dp, trees	3000	x692
1097F	Alex and a TV Show bitmasks, combinatorics, number theory	2500	x1221
1096E	The Top Scorer combinatorics, dp, math, probabilities	2500	x938
1096B	Substring Removal combinatorics, math, strings	1300	x10468
1091D	New Year and the Permutation Concatenation combinatorics, dp, math	1700	x6663
1089I	Interval-Free Permutations combinatorics	2600	x370
1085G	Beautiful Matrix combinatorics, data structures, dp	2900	x511
1084C	The Fair Nut and String combinatorics, dp, implementation	1500	x7848
1081C	Colorful Bricks combinatorics, dp, math	1500	x7165
1073E	Segment Sum bitmasks, combinatorics, dp, math	2300	x2452
1065E	Side Transmutations combinatorics, strings	2300	x1040
1060F	Shrinking Tree combinatorics, dp	2900	x583
1043F	Make It One bitmasks, combinatorics, dp, math, number theory, shortest paths	2500	x2289
1043D	Mysterious Crime brute force, combinatorics, math, meet-in-the-middle, two pointers	1700	x4389
1037F	Maximum Reduction combinatorics, data structures, math	2500	x988
1036F	Relatively Prime Powers combinatorics, math, number theory	2400	x1570
1036C	Classy Numbers combinatorics, dp	1900	x9026
1034C	Region Separation combinatorics, dp, number theory, trees	2700	x865
1028D	Order book combinatorics, data structures, greedy	2100	x1726
1027E	Inverse Coloring combinatorics, dp, math	2100	x2079
1009E	Intercity Travelling combinatorics, math, probabilities	2000	x2943
1007B	Pave the Parallelepiped bitmasks, brute force, combinatorics, math, number theory	2400	x944
1007A	Reorder the Array combinatorics, data structures, math, sortings, two pointers	1300	x12061
1000D	Yet Another Problem On a Subsequence combinatorics, dp	1900	x4062
997D	Cycles in product combinatorics, divide and conquer, trees	2900	x428
997C	Sky Full of Stars combinatorics, math	2500	x1668
997B	Roman Digits brute force, combinatorics, dp, greedy, math	2000	x2879
995F	Cowmpany Cowmpensation combinatorics, dp, math, trees	2700	x1195
991E	Bus Number brute force, combinatorics, math	1800	x3434
986B	Petr and Permutations combinatorics, math	1800	x4607
985G	Team Players combinatorics	2700	x471
981H	K Paths combinatorics, data structures, dp, fft, math	3100	x268
978E	Bus Video System combinatorics, math	1400	x9384
961G	Partitions combinatorics, math, number theory	2700	x1321
960G	Bandit Blues combinatorics, dp, fft, math	2900	x1047
960E	Alternating Tree combinatorics, dfs and similar, divide and conquer, dp, probabilities, trees	2300	x1875
954H	Path Counting combinatorics, dp	2500	x569
946F	Fibonacci String Subsequences combinatorics, dp, matrices	2400	x537
938E	Max History combinatorics, math	2300	x1244
933D	A Creative Cutout brute force, combinatorics, math	2900	x282
932E	Team Work combinatorics, dp, math	2400	x2755
929C	Красивая команда *special problem, combinatorics, math	1700	x1150
920G	List Of Integers binary search, bitmasks, brute force, combinatorics, math, number theory	2200	x1709
917C	Pollywog combinatorics, dp, matrices	2900	x387
914H	Ember and Storm's Tree Game combinatorics, dp, games, trees	3400	x235
914C	Travelling Salesman and Special Numbers brute force, combinatorics, dp	1800	x3674
908E	New Year and Entity Enumeration bitmasks, combinatorics, dp, math	2500	x749
900D	Unusual Sequences bitmasks, combinatorics, dp, math, number theory	2000	x3112
896D	Nephren Runs a Cinema chinese remainder theorem, combinatorics, math, number theory	2900	x522
895D	String Mark combinatorics, math, strings	2100	x1098
895C	Square Subsets bitmasks, combinatorics, dp, math	2000	x5261
894B	Ralph And His Magic Field combinatorics, constructive algorithms, math, number theory	1800	x4412
893E	Counting Arrays combinatorics, dp, math, number theory	2000	x3385
891E	Lust combinatorics, math, matrices	3000	x895
888D	Almost Identity Permutations combinatorics, dp, math	1600	x7954
886E	Maximum Element combinatorics, dp, math	2400	x992
878E	Numbers on the blackboard combinatorics, dp	3300	x499
875D	High Cry binary search, bitmasks, combinatorics, data structures, divide and conquer	2200	x2156
869C	The Intriguing Obsession combinatorics, dp, math	1800	x4493
865G	Flowers and Chocolate combinatorics, math, matrices	3300	x134
859E	Desk Disorder combinatorics, dfs and similar, dsu, graphs, trees	2100	x1841
856C	Eleventh Birthday combinatorics, dp, math	2400	x564
852F	Product transformation combinatorics, math, number theory	2200	x564
848E	Days of Floral Colours combinatorics, divide and conquer, dp, fft, math	3400	x202
848D	Shake It! combinatorics, dp, flows, graphs	2900	x380
844B	Rectangles combinatorics, math	1300	x7190
840C	On the Bench combinatorics, dp	2500	x1677
840A	Leha and Function combinatorics, greedy, math, number theory, sortings	1300	x6967
839D	Winter is here combinatorics, dp, math, number theory	2200	x2727
837F	Prefix Sums binary search, brute force, combinatorics, math, matrices	2400	x794
833C	Ever-Hungry Krakozyabra brute force, combinatorics, greedy, math	2700	x464
830D	Singer House combinatorics, dp, graphs, trees	2800	x812
817B	Makes And The Product combinatorics, implementation, math, sortings	1500	x5626
815D	Karen and Cards binary search, combinatorics, data structures, geometry	2800	x599
815B	Karen and Test brute force, combinatorics, constructive algorithms, math	2200	x1366
814E	An unavoidable detour for home combinatorics, dp, graphs, shortest paths	2600	x644
809C	Find a car combinatorics, divide and conquer, dp	2600	x734
804F	Fake bullions combinatorics, dfs and similar, dp, graphs, number theory	3400	x161
804B	Minimum number of steps combinatorics, greedy, implementation, math	1400	x9580
803F	Coprime Subsequences bitmasks, combinatorics, number theory	2000	x3111
794G	Replace All combinatorics, dp, math	3400	x329
788B	Weird journey combinatorics, constructive algorithms, dfs and similar, dsu, graphs	2100	x2499
785D	Anton and School - 2 combinatorics, dp, math, number theory	2300	x2723
776G	Sherlock and the Encrypted Data bitmasks, combinatorics, dp	2900	x335
773F	Test Data Generation combinatorics, divide and conquer, dp, fft, math, number theory	3400	x186
768F	Barrels and boxes brute force, combinatorics, math, number theory, probabilities	2300	x1008
762F	Tree nesting combinatorics, graphs, trees	2800	x364
757E	Bash Plays with Functions brute force, combinatorics, dp, number theory	2500	x1290
756E	Byteland coins combinatorics, dp, math	3200	x158
756D	Bacterial Melee brute force, combinatorics, dp, string suffix structures	2400	x996
755G	PolandBall and Many Other Balls combinatorics, divide and conquer, dp, fft, math, number theory	3200	x897
750G	New Year and Binary Tree Paths bitmasks, brute force, combinatorics, dp	3200	x445
747F	Igor and Interesting Numbers brute force, combinatorics, dp, math	2500	x416
735C	Tennis Championship combinatorics, constructive algorithms, greedy, math	1600	x7400
724F	Uniformly Branched Trees combinatorics, dp, trees	2700	x395
722E	Research Rover combinatorics, dp	2900	x808
717A	Festival Organization combinatorics, math, number theory	2900	x339
715E	Complete the Permutations combinatorics, fft, graphs, math	3400	x349