#include <bits/stdc++.h>
using namespace std;
const long double PI = acos(-1), eps = 1e-10;
int n, r, R;
long double a;
int main() {
  cin >> n >> R >> r;
  if (r > R) {
    if (n > 0)
      cout << "NO";
    else
      cout << "YES";
  } else if (2 * r > R) {
    if (n > 1)
      cout << "NO";
    else
      cout << "YES";
  } else {
    a = acos((long double)1 - (long double)r * (long double)r * 4 /
                                  (((long double)R - (long double)r) *
                                   ((long double)R - (long double)r) * 2));
    if (a < 0) a += PI * 2;
    if ((long double)n - eps > PI * 2 / a)
      cout << "NO";
    else
      cout << "YES";
  }
  return 0;
}
