#include <bits/stdc++.h>
using namespace std;
double n, R, r, x, angle;
int32_t main() {
  ios::sync_with_stdio(0);
  cin.tie(0);
  cout.tie(0);
  cin >> n >> R >> r;
  if (r > R) {
    cout << "NO\n";
    return 0;
  }
  if (n == 1) {
    if (R >= r)
      cout << "YES\n";
    else
      cout << "NO\n";
    return 0;
  }
  R -= r;
  x = r / R;
  x = asin(x);
  x *= (double)180;
  x /= acos(-1.0);
  angle = (double)360 / n;
  x *= (double)2;
  if (angle >= x)
    cout << "YES\n";
  else if (abs(x - angle) < (0.000000006))
    cout << "YES\n";
  else
    cout << "NO\n"
         << "\n";
  return 0;
}
