#include <bits/stdc++.h>
#pragma comment(linker, "/STACK:12000000")
using namespace std;
template <class T, class IT>
inline void PRINT(IT i1, IT i2) {
  cout << '[';
  copy(i1, i2, ostream_iterator<T>(cout, ", "));
  cout << "]\n";
}
int main() {
  int n, R, r;
  cin >> n >> R >> r;
  if (n == 1) {
    if (r <= R)
      cout << "YES\n";
    else
      cout << "NO\n";
  } else if (n == 2) {
    if (2 * r <= R)
      cout << "YES\n";
    else
      cout << "NO\n";
  } else {
    double angle = 3.141592653589793238462643 / n;
    if ((R - r) * sin(angle) > r - 1e-9)
      cout << "YES\n";
    else
      cout << "NO\n";
  }
  return 0;
}
