#include <cstdio>
#include <iostream>
#include <string>
#include <algorithm>
#include <vector>

using namespace std;

vector <string> v;

int main ()
{
    //freopen ("date.in", "r", stdin);
    string str;

    cin >> str;

    for (int i = 2; i <= 9; ++i)
    {
        for (int j = 0; j <= 9; ++j)
        {
            string aux = str;
            string::iterator it = aux.begin ();
            for (int k = 1; k <= i; ++k)
                ++it;
            aux.insert (it, '0' + j);
            v.push_back (aux);
        }
    }
    int sol = 1;
    sort (v.begin (), v.end ());
    for (int i = 1; i < v.size (); ++i)
        if (v[i] != v[i - 1])
            ++sol;
    printf ("%d\n", sol);
    return 0;
}