#include <bits/stdc++.h>
using namespace std;
int main() {
  int n;
  double R, r;
  cin >> n >> R >> r;
  if (n == 1) {
    if (r <= R)
      puts("YES");
    else
      puts("NO");
    return 0;
  }
  if (r > R) {
    puts("NO");
    return 0;
  }
  double sita = acos(1 - 2 * r * r / ((R - r) * (R - r)));
  double pi = acos(-1);
  if (n * sita <= 2 * pi || abs(n * sita - 2 * pi <= 1e-8))
    puts("YES");
  else
    puts("NO");
}
