Combinatorics I

Curated by : goc3

Average Problem Difficulty:

Why isn't it k choose n or k choose m or n choose m or ...?

Combinatorics I Master

+50 points

Problem Title	Likes	Solvers
Problem 577. Repopulate the City Created by: Ned Gulley Tags factors	12	49
Problem 604. Next lexicographic - permutation Created by: Muthu Annamalai Tags combinatorics, permutations	2	49
Problem 2487. Create Combination Created by: rifat Tags nchoosek	2	65
Problem 793. Combinations without using nchoosek Created by: Aurelien Queffurust Tags nchoosek, combinations	3	128
Problem 44241. NCHOOSEK - Time Optimization Created by: LY Cao Tags combinations, speed optimization	1	83
Problem 1855. Usage of java.math : N Choose K with unlimited precision Created by: Richard Zapor Tags nchoosek, java, bigdecimal	2	50
Problem 1888. Get ranking of a combination Created by: Doug Hull Tags combinations, speed optimization, lexicographic order	1	51
Problem 1889. Get ranking of a combination looking for speed. Created by: Doug Hull Tags speed	3	48
Problem 1516. Put m balls into n boxes Created by: Binbin Qi Tags perms nchoosek unique	1	66
Problem 1517. Put m balls into n boxes (again) Created by: Binbin Qi Tags nchoosek	2	62
Problem 1388. Numbered lottery balls into cells Created by: James Tags permutations, lottery, buckets	1	40
Problem 1393. A (wrong) place for everything, and everything in its (wrong) place Created by: James Tags permutations, organization	3	54
Problem 1147. Possible Outcomes of American Roulette Created by: Robert Turner Tags gamble, payout, odds	0	119
Problem 42494. Which permutation is it? Created by: Jan Orwat Tags indexing, permutations	2	32
Problem 42495. N-th permutation. Created by: Jan Orwat Tags indexing, permutations	2	33

Recent Group Finishers20

Recent Activity

	Binbin Qi submitted Solution 14523944 to Problem 1888. Get ranking of a combination on 15 Jan 2025
	DH submitted Solution 14397302 to Problem 44241. NCHOOSEK - Time Optimization on 18 Nov 2024
	DH submitted Solution 14397293 to Problem 793. Combinations without using nchoosek on 18 Nov 2024
	Shreyas submitted Solution 14357526 to Problem 44241. NCHOOSEK - Time Optimization on 15 Oct 2024
	MarKf submitted Solution 14311055 to Problem 577. Repopulate the City on 18 Sep 2024

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