#include <bits/stdc++.h>
using namespace std;

int day[] = { -1, 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 };

signed main(){
  int ans = 0;
  for( int i = 1; i <= 12; ++i )
    for( int j = 1; j <= day[ i ]; ++j )
      ans += i == ( j < 10 ? j : j / 10 + j % 10 );
  cout << ans << endl;
  return 0;
}