#include <bits/stdc++.h>
using namespace std;
int main() {
  char a[100000];
  int n, i, j, t, left, right, len;
  cin >> n;
  left = 0;
  right = 0;
  scanf("%s", a);
  len = strlen(a);
  for (i = 0; i < len; i++) {
    if (a[i] == 'L') left = left + 1;
    if (a[i] == 'R') right = right + 1;
  }
  cout << (left + right + 1) << "\n";
  return 0;
}
