#include <bits/stdc++.h>
using namespace std;
const int inf = INT_MAX / 2;
const int Maxn = 300;
int n;
double R, r;
const double pi = acos(-1);
const double EPS = 1e-10;
int solve() {
  int k;
  if (r > R) return 0;
  if (2 * r > R) return 1;
  double a = asin(r / (R - r)) * 2;
  k = 2 * pi / a + EPS;
  return k;
}
int main() {
  cin >> n >> R >> r;
  int ans = solve();
  if (ans >= n)
    cout << "YES";
  else
    cout << "NO";
  return 0;
}
