A permutation is an ordered arrangement of objects. For example, 3124 is one possible permutation of the digits 1, 2, 3 and 4. If all of the permutations are listed numerically or alphabetically, we call it lexicographic order. The lexicographic permutations of 0, 1 and 2 are:
012 021 102 120 201 210
What is the millionth lexicographic permutation of the digits 0, 1, 2, 3, 4, 5, 6, 7, 8 and 9?
Here is my (lazy) solution in Python – don’t reinvent the wheel if you don’t have to.
import itertools permList = list(itertools.permutations([0,1,2,3,4,5,6,7,8,9], 10)) print permList[999999]