#include <bits/stdc++.h>
using namespace std;
int main() {
  string a;
  int n, i, x = 0, y = 0;
  cin >> n;
  cin >> a;
  for (i = 0; i < n; i++) {
    if (a[i] == 'L') {
      x++;
    } else if (a[i] == 'R') {
      y++;
    }
  }
  cout << x + y + 1 << endl;
  return 0;
}
