#include <bits/stdc++.h>
using namespace std;
int main() {
  ios_base::sync_with_stdio(0);
  cin.tie(0);
  int t = 1;
  while (t--) {
    int n;
    cin >> n;
    string s;
    cin >> s;
    int ans = 0, l = 0, r = 0;
    for (int i = 0; i < n; i++) {
      if (s[i] == 'L')
        l++;
      else
        r++;
    }
    cout << l + r + 1;
  }
  return 0;
}
