#include <bits/stdc++.h>
#define int long long
using namespace std;
using Graph = vector<vector<int>>;

signed main(){
  string S;
  cin >> S;
  
  int ans = 0;
  string num = "123456789";
  vector<int> kazu;
  kazu = {1,2,3,4,5,6,7,8,9};
  for( int i = 0; i < S.size(); i++ ){
    for( int j = 0; j < 9; j++ ){
      if( S.at(i) == num.at(j) ) ans += kazu.at(j);
    }
  }
  cout << ans << endl;
  
  
}