Problemset - Codeforces

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Codeforces Round (Div. 3)
4 days

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Difficulty: —

combinatorics

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Problems

#	Name
1097G	Vladislav and a Great Legend combinatorics, dp, trees	3000	x692
1097F	Alex and a TV Show bitmasks, combinatorics, number theory	2500	x1220
1096E	The Top Scorer combinatorics, dp, math, probabilities	2500	x934
1096B	Substring Removal combinatorics, math, strings	1300	x10452
1091D	New Year and the Permutation Concatenation combinatorics, dp, math	1700	x6658
1089I	Interval-Free Permutations combinatorics	2600	x370
1085G	Beautiful Matrix combinatorics, data structures, dp	2900	x510
1084C	The Fair Nut and String combinatorics, dp, implementation	1500	x7823
1081C	Colorful Bricks combinatorics, dp, math	1500	x7121
1073E	Segment Sum bitmasks, combinatorics, dp, math	2300	x2439
1065E	Side Transmutations combinatorics, strings	2300	x1038
1060F	Shrinking Tree combinatorics, dp	2900	x551
1043F	Make It One bitmasks, combinatorics, dp, math, number theory, shortest paths	2500	x2219
1043D	Mysterious Crime brute force, combinatorics, math, meet-in-the-middle, two pointers	1700	x4387
1037F	Maximum Reduction combinatorics, data structures, math	2500	x986
1036F	Relatively Prime Powers combinatorics, math, number theory	2400	x1564
1036C	Classy Numbers combinatorics, dp	1900	x8943
1034C	Region Separation combinatorics, dp, number theory, trees	2700	x863
1028D	Order book combinatorics, data structures, greedy	2100	x1720
1027E	Inverse Coloring combinatorics, dp, math	2100	x2075
1009E	Intercity Travelling combinatorics, math, probabilities	2000	x2941
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	x12049
1000D	Yet Another Problem On a Subsequence combinatorics, dp	1900	x4053
997D	Cycles in product combinatorics, divide and conquer, trees	2900	x428
997C	Sky Full of Stars combinatorics, math	2500	x1664
997B	Roman Digits brute force, combinatorics, dp, greedy, math	2000	x2877
995F	Cowmpany Cowmpensation combinatorics, dp, math, trees	2700	x1185
991E	Bus Number brute force, combinatorics, math	1800	x3430
986B	Petr and Permutations combinatorics, math	1800	x4581
985G	Team Players combinatorics	2700	x471
981H	K Paths combinatorics, data structures, dp, fft, math	3100	x268
978E	Bus Video System combinatorics, math	1400	x9367
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	x1852
954H	Path Counting combinatorics, dp	2500	x567
946F	Fibonacci String Subsequences combinatorics, dp, matrices	2400	x537
938E	Max History combinatorics, math	2300	x1240
933D	A Creative Cutout brute force, combinatorics, math	2900	x282
932E	Team Work combinatorics, dp, math	2400	x2750
929C	Красивая команда *special problem, combinatorics, math	1700	x1149
920G	List Of Integers binary search, bitmasks, brute force, combinatorics, math, number theory	2200	x1702
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	x3673
908E	New Year and Entity Enumeration bitmasks, combinatorics, dp, math	2500	x746
900D	Unusual Sequences bitmasks, combinatorics, dp, math, number theory	2000	x3047
896D	Nephren Runs a Cinema chinese remainder theorem, combinatorics, math, number theory	2900	x520
895D	String Mark combinatorics, math, strings	2100	x1097
895C	Square Subsets bitmasks, combinatorics, dp, math	2000	x5230
894B	Ralph And His Magic Field combinatorics, constructive algorithms, math, number theory	1800	x4398
893E	Counting Arrays combinatorics, dp, math, number theory	2000	x3364
891E	Lust combinatorics, math, matrices	3000	x889
888D	Almost Identity Permutations combinatorics, dp, math	1600	x7916
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	x2078
869C	The Intriguing Obsession combinatorics, dp, math	1800	x4488
865G	Flowers and Chocolate combinatorics, math, matrices	3300	x134
859E	Desk Disorder combinatorics, dfs and similar, dsu, graphs, trees	2100	x1702
856C	Eleventh Birthday combinatorics, dp, math	2400	x544
852F	Product transformation combinatorics, math, number theory	2200	x563
848E	Days of Floral Colours combinatorics, divide and conquer, dp, fft, math	3400	x202
848D	Shake It! combinatorics, dp, flows, graphs	2900	x379
844B	Rectangles combinatorics, math	1300	x7172
840C	On the Bench combinatorics, dp	2500	x1673
840A	Leha and Function combinatorics, greedy, math, number theory, sortings	1300	x6967
839D	Winter is here combinatorics, dp, math, number theory	2200	x2711
837F	Prefix Sums binary search, brute force, combinatorics, math, matrices	2400	x794
833C	Ever-Hungry Krakozyabra brute force, combinatorics, greedy, math	2700	x463
830D	Singer House combinatorics, dp, graphs, trees	2800	x812
817B	Makes And The Product combinatorics, implementation, math, sortings	1500	x5613
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	x160
804B	Minimum number of steps combinatorics, greedy, implementation, math	1400	x9577
803F	Coprime Subsequences bitmasks, combinatorics, number theory	2000	x3099
794G	Replace All combinatorics, dp, math	3400	x328
788B	Weird journey combinatorics, constructive algorithms, dfs and similar, dsu, graphs	2100	x2355
785D	Anton and School - 2 combinatorics, dp, math, number theory	2300	x2714
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	x185
768F	Barrels and boxes brute force, combinatorics, math, number theory, probabilities	2300	x1008
762F	Tree nesting combinatorics, graphs, trees	2800	x357
757E	Bash Plays with Functions brute force, combinatorics, dp, number theory	2500	x1278
756E	Byteland coins combinatorics, dp, math	3200	x158
756D	Bacterial Melee brute force, combinatorics, dp, string suffix structures	2400	x984
755G	PolandBall and Many Other Balls combinatorics, divide and conquer, dp, fft, math, number theory	3200	x892
750G	New Year and Binary Tree Paths bitmasks, brute force, combinatorics, dp	3200	x444
747F	Igor and Interesting Numbers brute force, combinatorics, dp, math	2500	x415
735C	Tennis Championship combinatorics, constructive algorithms, greedy, math	1600	x7385
724F	Uniformly Branched Trees combinatorics, dp, trees	2700	x394
722E	Research Rover combinatorics, dp	2900	x806
717A	Festival Organization combinatorics, math, number theory	2900	x339
715E	Complete the Permutations combinatorics, fft, graphs, math	3400	x349
712D	Memory and Scores combinatorics, dp, math	2200	x1803
711D	Directed Roads combinatorics, dfs and similar, graphs, math	1900	x4388