#include <bits/stdc++.h>
using namespace std;
int main() {
  ios_base::sync_with_stdio(false);
  cin.tie(NULL);
  int n, R, r;
  cin >> n >> R >> r;
  if (r > R) {
    cout << "NO\n";
    return 0;
  }
  if (2 * r > R) {
    cout << (n == 1 ? "YES\n" : "NO\n");
    return 0;
  }
  long double theta = asin((long double)r / (R - r));
  theta *= 2.0L * n;
  if (theta > 2 * acos(-1.0L)) {
    cout << "NO\n";
  } else {
    cout << "YES\n";
  }
  return 0;
}
