#include <iostream>
#include <cstring>

using namespace std;

char s[11];

void rezolva() {
    long long sol = 0;

    s[9] = 'a';

    for (char i = '0'; i <= '9'; i++) {
        //cout << i << '\n';
        sol++;
        for (int j = 2; j < 9; j++) {
            if (s[j] != i) sol++;
            //cout << s[j] << ' ' << sol << endl;
        }
    }

    cout << sol;
}

int main() {
    cin >> s;
    rezolva();
}