Introduction - If you have any usage issues, please Google them yourself
n elements (1, 2, ..., n) n! Different permutations. This n! Arranged according to a lexicographic order, and numbered 0, 1, ..., n!-1. No. each with a value for their lexicographic. Given n and n elements (1, 2, ..., n) an arrangement worked out with a dictionary of the order value, and by lexicographic order with the next one.