#include <bits/stdc++.h>
using namespace std;
int main() {
  int n;
  double R, r;
  cin >> n >> R >> r;
  if (n == 1) {
    if (r <= R)
      cout << "YES" << endl;
    else
      cout << "NO" << endl;
  } else if (n == 2) {
    if (4 * r <= 2 * R)
      cout << "YES" << endl;
    else
      cout << "NO" << endl;
  } else {
    double ang = 180.0 / n;
    double side = 2 * (R - r) * sin(ang * 3.14159265 / 180);
    if (side + 1e-7 > 2 * r)
      cout << "YES" << endl;
    else
      cout << "NO" << endl;
  }
  return 0;
}
