#include <bits/stdc++.h>
int main() {
  int n, i, c1 = 0, c2 = 0;
  scanf("%d", &n);
  char s1[n + 2];
  scanf("%s", s1);
  for (i = 0; i < n; i++) {
    if (s1[i] == 'L') {
      c1++;
    } else {
      c2++;
    }
  }
  printf("%d", c1 + c2 + 1);
}
