#include <bits/stdc++.h>
using namespace std;
#ifdef LOCAL
  #include "settings/debug.cpp"
  #define _GLIBCXX_DEBUG
#else
  #define Debug(...) void(0)
#endif
#define rep(i, n) for (int i = 0; i < (n); ++i)
using ll = long long;
using ull = unsigned long long;

int main() {
  string s;
  cin >> s;
  set<string> st;
  rep(i, s.size() + 1) {
    rep(d, 10) {
      string t = s.substr(0, i) + to_string(d) + s.substr(i);
      if (to_string(stoll(t)) == t) st.insert(t);
    }
  }
  cout << st.size() << endl;
  return 0;
}