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