#include <bits/stdc++.h>
using namespace std;
int main() {
  ios::sync_with_stdio(0);
  cin.tie(0);
  cout.tie(0);
  int n;
  double r, R;
  cin >> n >> R >> r;
  const double eps = 1e-9;
  const double ppi = acos(-1.0);
  if (r > R) {
    cout << "NO" << '\n';
  } else if (2 * r > R) {
    if (n <= 1)
      cout << "YES" << '\n';
    else
      cout << "NO" << '\n';
  } else {
    double rr = r / (R - r);
    if (n * asin(rr) <= ppi + eps)
      cout << "YES" << '\n';
    else
      cout << "NO" << '\n';
  }
  return 0;
}
