Problemset - Codeforces

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combinatorics

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Problems

#	Name
815D	Karen and Cards binary search, combinatorics, data structures, geometry	2800	x616
815B	Karen and Test brute force, combinatorics, constructive algorithms, math	2200	x1382
814E	An unavoidable detour for home combinatorics, dp, graphs, shortest paths	2600	x671
809C	Find a car combinatorics, divide and conquer, dp	2600	x813
804F	Fake bullions combinatorics, dfs and similar, dp, graphs, number theory	3400	x164
804B	Minimum number of steps combinatorics, greedy, implementation, math	1400	x9691
803F	Coprime Subsequences bitmasks, combinatorics, number theory	2000	x3350
794G	Replace All combinatorics, dp, math	3400	x346
788B	Weird journey combinatorics, constructive algorithms, dfs and similar, dsu, graphs	2100	x2598
785D	Anton and School - 2 combinatorics, dp, math, number theory	2300	x3006
776G	Sherlock and the Encrypted Data bitmasks, combinatorics, dp	2900	x339
773F	Test Data Generation combinatorics, divide and conquer, dp, fft, math, number theory	3400	x189
768F	Barrels and boxes brute force, combinatorics, math, number theory, probabilities	2300	x1032
762F	Tree nesting combinatorics, graphs, trees	2800	x380
757E	Bash Plays with Functions brute force, combinatorics, dp, number theory	2500	x1337
756E	Byteland coins combinatorics, dp, math	3200	x180
756D	Bacterial Melee brute force, combinatorics, dp, string suffix structures	2400	x1006
755G	PolandBall and Many Other Balls combinatorics, divide and conquer, dp, fft, math, number theory	3200	x923
750G	New Year and Binary Tree Paths bitmasks, brute force, combinatorics, dp	3200	x452
747F	Igor and Interesting Numbers brute force, combinatorics, dp, math	2500	x422
735C	Tennis Championship combinatorics, constructive algorithms, greedy, math	1600	x7545
724F	Uniformly Branched Trees combinatorics, dp, trees	2700	x404
722E	Research Rover combinatorics, dp	2900	x876
717A	Festival Organization combinatorics, math, number theory	2900	x369
715E	Complete the Permutations combinatorics, fft, graphs, math	3400	x357
712D	Memory and Scores combinatorics, dp, math	2200	x1847
711D	Directed Roads combinatorics, dfs and similar, graphs, math	1900	x4499
698F	Coprime Permutation combinatorics, number theory	3000	x438
696C	PLEASE combinatorics, dp, implementation, math, matrices	2000	x2086
690D2	The Wall (medium) combinatorics	1800	x1249
689E	Mike and Geometry Problem combinatorics, data structures, dp, geometry, implementation	2000	x1942
689C	Mike and Chocolate Thieves binary search, combinatorics, math	1700	x5392
685A	Robbers' watch brute force, combinatorics, dp, math	1700	x4244
677C	Vanya and Label bitmasks, combinatorics, implementation, strings	1500	x6442
666C	Codeword combinatorics, strings	2500	x787
660E	Different Subsets For All Tuples combinatorics, math	2300	x1527
659G	Fence Divercity combinatorics, dp, number theory	2300	x1208
653G	Move by Prime combinatorics, math, number theory	3100	x557
652C	Foe Pairs combinatorics, sortings, two pointers	1800	x3254
645F	Cowslip Collections combinatorics, math, number theory	2500	x797
630I	Parking Lot combinatorics, math	1700	x6861
630H	Benches combinatorics, math	1400	x5042
630G	Challenge Pennants combinatorics, math	1600	x2801
630F	Selection of Personnel combinatorics, math	1300	x6953
630C	Lucky Numbers combinatorics, math	1100	x22320
629E	Famil Door and Roads combinatorics, data structures, dfs and similar, dp, probabilities, trees	2300	x1024
629A	Far Relative’s Birthday Cake brute force, combinatorics, constructive algorithms, implementation	800	x13472
626D	Jerry's Protest brute force, combinatorics, dp, probabilities	1800	x2766
623E	Transforming Sequence combinatorics, dp, fft, math	3300	x550
621C	Wet Shark and Flowers combinatorics, math, number theory, probabilities	1700	x5582
621B	Wet Shark and Bishops combinatorics, implementation	1300	x11067
617B	Chocolate combinatorics	1300	x18104
612E	Square Root of Permutation combinatorics, constructive algorithms, dfs and similar, graphs, math	2200	x1718
610A	Pasha and Stick combinatorics, math	1000	x23503
608B	Hamming Distance Sum combinatorics, strings	1500	x6865
603B	Moodular Arithmetic combinatorics, dfs and similar, dsu, math, number theory	1800	x2589
596C	Wilbur and Points combinatorics, greedy, sortings	1700	x2258
585E	Present for Vitalik the Philatelist combinatorics, math, number theory	2900	x1114
584B	Kolya and Tanya combinatorics	1500	x12048
577B	Modulo Sum combinatorics, data structures, dp, two pointers	1900	x12339
575H	Bots combinatorics, dp, math, number theory	1800	x1692
571A	Lengthening Sticks combinatorics, implementation, math	2100	x2330
570E	Pig and Palindromes combinatorics, dp	2300	x1909
568B	Symmetric and Transitive combinatorics, dp, math	1900	x2250
559D	Randomizer combinatorics, geometry, probabilities	2800	x441
559C	Gerald and Giant Chess combinatorics, dp, math, number theory	2200	x6586
557D	Vitaly and Cycle combinatorics, dfs and similar, graphs, math	2000	x2213
553B	Kyoya and Permutation binary search, combinatorics, constructive algorithms, greedy, implementation, math	1900	x2120
553A	Kyoya and Colored Balls combinatorics, dp, math	1500	x8714
552D	Vanya and Triangles brute force, combinatorics, data structures, geometry, math, sortings	1900	x4497
551D	GukiZ and Binary Operations combinatorics, implementation, math, matrices, number theory	2100	x1967
547C	Mike and Foam bitmasks, combinatorics, dp, math, number theory	2300	x2901
535B	Tavas and SaDDas bitmasks, brute force, combinatorics, implementation	1100	x22650
520E	Pluses everywhere combinatorics, dp, math, number theory	2200	x1882
518F	Pasha and Pipe binary search, brute force, combinatorics, dp, implementation	2300	x374
518D	Ilya and Escalator combinatorics, dp, math, probabilities	1700	x7053
506E	Mr. Kitayuta's Gift combinatorics, dp, matrices, strings	3000	x760
501E	Misha and Palindrome Degree binary search, combinatorics, implementation	2500	x918
500D	New Year Santa Network combinatorics, dfs and similar, graphs, trees	1900	x3127
489F	Special Matrices combinatorics, dp	2100	x1673
489D	Unbearable Controversy of Being brute force, combinatorics, dfs and similar, graphs	1700	x6708
482D	Random Function and Tree combinatorics, dp, trees	2700	x536
479E	Riding in a Lift combinatorics, dp	1900	x5169
478B	Random Teams combinatorics, constructive algorithms, greedy, math	1300	x36891
476B	Dreamoon and WiFi bitmasks, brute force, combinatorics, dp, math, probabilities	1300	x31119
466D	Increase Sequence combinatorics, dp	2100	x3233
459C	Pashmak and Buses combinatorics, constructive algorithms, math	1900	x6193
459B	Pashmak and Flowers combinatorics, implementation, sortings	1300	x40740
457D	Bingo! combinatorics, math, probabilities	2700	x282
452C	Magic Trick combinatorics, math, probabilities	2100	x1630
451E	Devu and Flowers bitmasks, combinatorics, number theory	2300	x3669
449D	Jzzhu and Numbers bitmasks, combinatorics, dp	2400	x4537
439E	Devu and Birthday Celebration combinatorics, dp, math	2100	x1574
438E	The Child and Binary Tree combinatorics, divide and conquer, fft, number theory	3100	x1894
431D	Random Task binary search, bitmasks, combinatorics, dp, math	2100	x2323
414C	Mashmokh and Reverse Operation combinatorics, divide and conquer	2100	x2225
414B	Mashmokh and ACM combinatorics, dp, number theory	1400	x22594
407C	Curious Array brute force, combinatorics, implementation, math	2500	x1010
403D	Beautiful Pairs of Numbers combinatorics, dp	2300	x1112
401D	Roman and Numbers bitmasks, brute force, combinatorics, dp, number theory	2000	x4197