#include <bits/stdc++.h>
using namespace std;
const long double PI =
    3.141592653589793238462643383279502884197169399375105820974944592307816406286;
int main() {
  int n, R, r;
  scanf("%d %d %d", &n, &R, &r);
  if (r > R) {
    puts("NO");
    return 0;
  }
  if (n == 1) {
    puts("YES");
    return 0;
  }
  long double angle = asin((long double)r / ((long double)R - r));
  if (angle * n <= PI + 0.00000001)
    puts("YES");
  else
    puts("NO");
  return 0;
}
