#include <bits/stdc++.h>
using namespace std;
const long long mxn = 1e5 + 1;
const long long mod = 1e9 + 7;
const double pi = 3.1415926;
bool sortbysec(const pair<int, int> &a, const pair<int, int> &b) {
  return (a.second < b.second);
}
void solve() {
  long long n, R, r;
  cin >> n >> R >> r;
  double n_ = n;
  double R_ = R;
  double r_ = r;
  if (n == 1) {
    if (R >= r)
      cout << "YES" << '\n';
    else
      cout << "NO" << '\n';
    return;
  }
  if ((R_ - r_) * sin(pi / n_) >= r - 1e-7) {
    cout << "YES" << '\n';
    return;
  }
  cout << "NO" << '\n';
}
int main() {
  ios_base::sync_with_stdio(false);
  cin.tie(NULL);
  cout.tie(NULL);
  ;
  solve();
  return 0;
}
