#include <bits/stdc++.h>
int main() {
  int n;
  int R, r;
  scanf("%d %d %d", &n, &R, &r);
  if (R < r) {
    puts(n == 0 ? "YES" : "NO");
    return 0;
  }
  if (R < 2 * r) {
    puts(n <= 1 ? "YES" : "NO");
    return 0;
  }
  int d = R - r;
  int nplates = M_PI / asin((double)r / (double)d) + 1e-9;
  puts(n <= nplates ? "YES" : "NO");
  return 0;
}
