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