#include <iostream>
#include <set>
#include <algorithm>
using namespace std;
int main()
{
    string s;
    cin >> s;

    sort(s.begin(), s.end());
    int result = 0;
    do {
        if(s[0] != '0') {
            result++;
        }

    } while(next_permutation(s.begin(), s.end()));
    cout << result << endl;
    return 0;
}