#include <bits/stdc++.h>
const long long inf = 0x3f3f3f3f3f3f3f3LL;
const long long mod = (long long)1e9 + 7;
using namespace std;
template <class T>
void smin(T& a, T val) {
  if (a > val) a = val;
}
template <class T>
void smax(T& a, T val) {
  if (a < val) a = val;
}
const long long N = 5 * (long long)1e5 + 10;
long long n, a[N];
int32_t main() {
  ios_base::sync_with_stdio(false);
  cin.tie(NULL);
  cout.tie(NULL);
  cin >> n;
  string s;
  cin >> s;
  long long red = 0, blue = 0;
  for (long long i = 0; i < n; ++i) {
    red += (s[i] == 'R');
    blue += (s[i] == 'R');
  }
  if (red > blue) {
    cout << "Yes\n";
  } else {
    cout << "No\n";
  }
  return 0;
}
