Problemset - Codeforces

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combinatorics

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Problems

#	Name
1166A	Silent Classroom combinatorics, greedy	900	x13992
1732A	Bestie brute force, combinatorics, constructive algorithms, implementation, math, number theory	1000	x14461
1391C	Cyclic Permutations combinatorics, dp, graphs, math	1500	x14567
1552B	Running for Gold combinatorics, graphs, greedy, sortings	1500	x15002
1879C	Make it Alternating combinatorics, dp, greedy	1300	x15055
1326C	Permutation Partitions combinatorics, greedy, math	1300	x15299
1823A	A-characteristic combinatorics, constructive algorithms, math	800	x15832
1931D	Divisible Pairs combinatorics, math, number theory	1300	x16062
1862D	Ice Cream Balls binary search, combinatorics, constructive algorithms, math	1300	x16142
1777B	Emordnilap combinatorics, greedy, math	900	x16624
251A	Points on Line binary search, combinatorics, two pointers	1300	x16805
1574B	Combinatorics Homework combinatorics, greedy, math	1100	x17065
1843D	Apple Tree combinatorics, dfs and similar, dp, math, trees	1200	x17105
617B	Chocolate combinatorics	1300	x17379
1827A	Counting Orders combinatorics, math, sortings, two pointers	1100	x17565
1433E	Two Round Dances combinatorics, math	1300	x18061
1658B	Marin and Anti-coprime Permutation combinatorics, math, number theory	800	x18386
1582B	Luntik and Subsequences combinatorics, math	900	x18982
1922B	Forming Triangles combinatorics, constructive algorithms, math, sortings	1200	x19145
1821A	Matching combinatorics, math	800	x19396
1917B	Erase First or Second Letter brute force, combinatorics, data structures, dp, strings	1100	x19583
1539A	Contest Start combinatorics, geometry, greedy, math	1000	x19629
1475C	Ball in Berland combinatorics, graphs, math	1400	x20048
630C	Lucky Numbers combinatorics, math	1100	x20480
1293B	JOE is on TV! combinatorics, greedy, math	1000	x20842
414B	Mashmokh and ACM combinatorics, dp, number theory	1400	x20953
1499A	Domino on Windowsill combinatorics, constructive algorithms, math	800	x21027
1840B	Binary Cafe bitmasks, combinatorics, math	1100	x21584
535B	Tavas and SaDDas bitmasks, brute force, combinatorics, implementation	1100	x21700
1771A	Hossam and Combinatorics combinatorics, math, sortings	900	x22103
610A	Pasha and Stick combinatorics, math	1000	x22108
1543B	Customising the Track combinatorics, greedy, math	900	x22692
1514B	AND 0, Sum Big bitmasks, combinatorics, math	1200	x22960
1674C	Infinite Replacement combinatorics, implementation, strings	1000	x22966
1855B	Longest Divisors Interval brute force, combinatorics, greedy, math, number theory	900	x24024
1840C	Ski Resort combinatorics, math, two pointers	1000	x24829
1272C	Yet Another Broken Keyboard combinatorics, dp, implementation	1200	x25236
1674B	Dictionary combinatorics, math	800	x25678
1743A	Password brute force, combinatorics, implementation, math	800	x26188
1328B	K-th Beautiful String binary search, brute force, combinatorics, implementation, math	1300	x28195
476B	Dreamoon and WiFi bitmasks, brute force, combinatorics, dp, math, probabilities	1300	x29156
1843C	Sum in Binary Tree bitmasks, combinatorics, math, trees	800	x31236
478B	Random Teams combinatorics, constructive algorithms, greedy, math	1300	x35390
459B	Pashmak and Flowers combinatorics, implementation, sortings	1300	x38608

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