#include <bits/stdc++.h>
using namespace std;
void yes() {
  cout << "YES";
  exit(0);
}
void no() {
  cout << "NO";
  exit(0);
}
int main() {
  int n, R, r;
  cin >> n >> R >> r;
  if (r > R) no();
  if (n == 1) yes();
  if (2 * r > R) {
    if (n == 1)
      yes();
    else
      no();
  }
  if (2 * r == R) {
    if (n == 2)
      yes();
    else
      no();
  }
  double alpha = 2 * asin(double(r) / (R - r));
  double pi2 = 2 * acos(-1.0);
  if (alpha * n > pi2 + 1e-9)
    no();
  else
    yes();
  return 0;
}
