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