#include <bits/stdc++.h>
using namespace std;
int main() {
  ios_base::sync_with_stdio(false);
  cin.tie(NULL);
  int n, R, r;
  while (cin >> n >> R >> r) {
    if (r > R) {
      cout << "NO" << '\n';
      return 0;
    }
    if (n == 1) {
      cout << "YES" << '\n';
      return 0;
    }
    if (r > R - r) {
      cout << "NO" << '\n';
      return 0;
    }
    double angle = asin((double)r / (R - r));
    if (angle * n < 3.1415926536 + 1e-9)
      cout << "YES" << '\n';
    else
      cout << "NO" << '\n';
  }
}
