#include <bits/stdc++.h>
#pragma warning(disable : 4244 4267 4018 4996 4800)
using namespace std;
istream& in = cin;
ostream& out = cout;
void print(bool t) {
  out << (t ? "YES" : "NO");
  exit(0);
}
int main() {
  double const pi = acos(-1.);
  double n, R, r;
  in >> n >> R >> r;
  if (r > R) print(false);
  if (r > R / 2) print(n == 1);
  double a = asin(r / (R - r));
  print(n * a <= pi + 1e-9);
}
