#include <bits/stdc++.h>
using namespace std;
int main() {
  string s;
  int n;
  scanf("%d", &n);
  cin >> s;
  int l = 0, r = 0;
  for (int i = 0; i < s.length(); i++) {
    if (s[i] == 'L')
      l++;
    else
      r++;
  }
  printf("%d\n", l + r + 1);
}
