Algorithm based Combinatorics problem IMO style
54521
Making all row sums and column sums non-negative by a sequence of moves
23322
Combinatorics Inclusion - Exclusion Principle
107110
Solving Rubik's cube and other permutation puzzles
8049
Generating Combinations
138072
Linear time algorithm for 2-SUM
85023
Permutation of n objects with restriction of adjacent pairs
43962
Penguin Brainteaser : 321-avoiding permutations
88356
Number of options to distribute $N$ different balls to $K$ numbered cells
9411
Number of permutations of $n$ elements where no number $i$ is in position $i$
39540
Efficient Algorithm for finding left (or right) Transversal in a Group
8149
Algorithm to return all combinations of k elements from n
118560
Ordered N-Tuples as Cartesian Products of Indexed Families
140806
How do I tackle this combinatorics problem about married couples around a table?
139039
Stars and Bars Combinatorics Problem
87431
$n-$circular arrangement problem
134599
How do I do Combinatorics / Counting?
45386
Fibonacci sequence emerging from integer partitioning