New posts in combinations

Counting Binary Strings (No block decompositions)

combinatorics combinations bit-strings

Number of Unique Sequences with Circular Shifts

sequences-and-series combinatorics algebra-precalculus combinations binary

counting combinations and permutations efficiently

python algorithm math combinations permutation

Number of isoceles triangles formed by the vertices of a polygon that are not equilateral

combinatorics combinations triangles polygons

How to group people so everyone meets?

probability combinatorics combinations

Combinatorial proof $\sum_i^{\lfloor{n/2}\rfloor} (-1)^i {n-i\choose i} 2^{n-2i} = n+1$

combinatorics combinations combinatorial-proofs

$ \sum_{x=1}^n {{n-1} \choose {x-1}} {N \choose x} = {{N+n-1}\choose n}$ [duplicate]

combinatorics combinations factorial

How many solutions does the equation $\sum_{i=1}^{k}{x_i}=c$ have, given that the $x_i\in\mathbb{Z}$ and $0\leq x_i\leq d$?

combinatorics discrete-mathematics permutations combinations inclusion-exclusion

Two squares are chosen at random on a chessboard. What is the probability that they have a side in common?

probability statistics permutations combinations

Implementation of Permutation, Combinations and PowerSet in C++ [duplicate]

c++ c++11 combinations permutation powerset

How many ways are there to fill up a $2n \times 2n$ matrix with $1, -1$?

combinatorics permutations combinations

How to efficiently calculate a row in pascal's triangle?

algorithm combinations binomial-coefficients pascals-triangle

Unique string combinations

r vector unique combinations

Permutation - how to order 6 elements out of 13 with 3 conditions

combinatorics permutations combinations

Getting all combinations which sum up to 100 using R

r combinations

Placing a kth adjacent term in a row of k-1 non-adjacent terms

combinatorics combinations generating-functions

Given a list of elements in lexicographical order (i.e. ['a', 'b', 'c', 'd']), find the nth permutation - Average time to solve?

python list recursion combinations

All possible combinations of columns in dataframe -pandas/python

combinations pandas

get all combinations for a string

javascript combinations

In how many ways can we partition a set into smaller subsets so the sum of the numbers in each subset is equal?

combinatorics combinations