#include <bits/stdc++.h>
int main() {
  int i, j, k, f = 0, n, t, m, a, b, c;
  char x;
  a = 0;
  b = 0;
  scanf("%d", &n);
  for (i = 0; i < n; i++) {
    scanf("%c", &x);
    if (x == 'R') {
      a = a + 1;
    } else {
      b = b + 1;
    }
  }
  if (a > b) {
    printf("Yes");
  } else {
    printf("No");
  }
  return 0;
}
