#include <bits/stdc++.h>
using namespace std;
int main() {
  long int n, i, p1 = 0, p2 = 0;
  cin >> n;
  string s;
  cin >> s;
  for (i = 0; i < n; i++) {
    if (s[i] == 'L')
      p1++;
    else if (s[i] == 'R')
      p2++;
  }
  cout << p2 + p1 + 1 << '\n';
  return 0;
}
