#include <bits/stdc++.h>
using namespace std;
int main() {
  int n;
  cin >> n;
  vector<int> a(n);
  for (int i = 0; i < n; ++i) cin >> a[i];
  int sum = 0;
  for (int i = 0; i < n; ++i) {
    sum += a[i];
  }
  cout << sum - 7 << endl;
}
