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