#include <bits/stdc++.h>
using namespace std;
const double pi = 3.14159265358979;
int main() {
  int n, R, r;
  cin >> n >> R >> r;
  if (R < r) {
    if (n <= 0)
      cout << "YES";
    else
      cout << "NO";
    return 0;
  }
  R -= r;
  if (R < r) {
    if (n <= 1)
      cout << "YES";
    else
      cout << "NO";
    return 0;
  }
  double an = asin((double)r / R);
  int cnt = pi / an + 1e-6;
  if (n <= cnt)
    cout << "YES";
  else
    cout << "NO";
  return 0;
}
