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