考虑以下表达式：
$$\sqrt{a_1} \pm \sqrt{a_2} \pm \dots \pm \sqrt{a_n} = 0$$
计算将每个 $\pm$ 替换为 $+$ 或 $-$ 使得等式成立的方法数。
第一行包含一个整数 $n$ ($2 \le n \le 36$)。
第二行包含 $n$ 个整数 $a_1, a_2, \dots, a_n$ ($1 \le a_i \le 10^{10^5}$)。
输出一个整数：问题的答案。
3 2 2 8
1
4 4 9 25 49
0
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