#include <bits/stdc++.h>
using namespace std;
//#include <atcoder/all>
//using namespace atcoder;
//using mint = modint998244353;
//using mint = modint1000000007;
typedef long long ll;
typedef unsigned long long ull;
#define all(x) (x).begin(), (x).end()
#define rall(x) (x).rbegin(), (x).rend()
const int MAX = 1e9;
const int MIN = -1*1e9;
const ll MAXLL = 1e18;
const ll MINLL = -1*1e18;
//const ll MOD = 998244353;
//const ll MOD = 1000000007;
set<string> Ans;

int main()
{
    string S; cin >> S;
    for(int i = 0; i <= S.size(); i++)
    {
        for(int j = 0; j <= 9; j++)
        {
            if(i == 0 && j == 0) continue;
            string T;
            for(int k = 0; k <= S.size(); k++)
            {
                if(k == i) T += to_string(j);
                if(k != S.size()) T += S[k];
            }
            Ans.insert(T); 
        }
    }
    cout << Ans.size() << endl;
    return 0;
}