#include <bits/stdc++.h>
using namespace std;
const double PI = acos(-1.);
int main() {
  int n, R, r;
  cin >> n >> R >> r;
  if (n == 1) {
    if (R >= r) {
      cout << "YES" << endl;
      return 0;
    }
    cout << "NO" << endl;
    return 0;
  }
  if (n == 2) {
    if (R >= 2 * r) {
      cout << "YES" << endl;
      return 0;
    }
    cout << "NO" << endl;
    return 0;
  }
  double theta = 2 * PI / n;
  double x = double(r) / sin(theta / 2);
  if (x + r <= R) {
    cout << "YES" << endl;
    return 0;
  }
  cout << "NO" << endl;
  return 0;
}
