文件目录

#include <iostream>
using namespace std;
int main()
{
    int n, c = 0;
    cin >> n;
    while (n != 495)
    {
        c++;
        int a = n / 100, b = n / 10 % 10, c = n % 10;
        if (a < b)
            swap(a, b);
        if (a < c)
            swap(a, c);
        if (b < c)
            swap(b, c);
        n = a * 100 + c - a - c * 100;
    }
    cout << c;
    return 0;
}