#include <bits/stdc++.h>
using namespace std;
int main() {
  int n;
  cin >> n;
  string s;
  cin >> s;
  int i, l = 0, r = 0;
  for (i = 0; i < n; i++) {
    if (s[i] == 'L')
      l++;
    else
      r++;
  }
  long long ans = 1;
  ans += r + l;
  cout << ans;
  return 0;
}
