#include <bits/stdc++.h>
using namespace std;
long double pi = 4 * atan(1.0);
int main() {
  int n;
  long long R, r;
  cin >> n >> R >> r;
  int sum = 0;
  if (r * 2 > R && r <= R)
    sum = 1;
  else if (R > r) {
    long double x = (R - r);
    long double p = 2 * pi * x;
    long double teta = 2 * asin(r / x);
    long double kaman = teta * x;
    sum = p / kaman + 1e-9;
  }
  if (sum >= n)
    cout << "YES" << endl;
  else
    cout << "NO" << endl;
}
