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