#include <bits/stdc++.h>
using namespace std;
int main() {
  int n, l = 0, r = 0;
  string mov;
  cin >> n >> mov;
  for (int i = 0; i < n; i++) (mov[i] == 'L') ? l++ : r++;
  printf("%d", l + r + 1);
  return 0;
}
