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