Veci

ID: veci

Difficulty: 1.8

CPU Time: 1 second

Memory: 1024 MB

Solution

One could implement methods to check all the digits of a number, do a loop to see all numbers <= 999,999 that have them, compare, etc. but the easiest way is to take X as an array of digits, and take every permutation of X, keeping a variable to track the smallest ordering that is strictly greater than the original X.