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