#include <bits/stdc++.h>
using namespace std;
const double PI = 3.1415926535897;
const double EPS = 1e-9;
int main() {
  int n, R, r;
  cin >> n >> R >> r;
  if (r == R) {
    if (n == 1)
      cout << "YES" << endl;
    else
      cout << "NO" << endl;
    return 0;
  }
  if (r > R) {
    cout << "NO" << endl;
    return 0;
  }
  if (2 * r > R) {
    if (n == 1)
      cout << "YES" << endl;
    else
      cout << "NO" << endl;
    return 0;
  }
  if (2 * r == R) {
    if (n <= 2)
      cout << "YES" << endl;
    else
      cout << "NO" << endl;
    return 0;
  }
  double teta = asin(r / (double)(R - r));
  if (((n * teta) <= (PI + EPS)) || ((n * teta) <= (PI - teta)))
    cout << "YES" << endl;
  else
    cout << "NO" << endl;
}
