[1,2,3]
6
[-1,-2,-3]
-6
[-10, -5, 1, 2, 3, 4, 5]
250
-10 * -5 * 5
示例 1:输入:nums = [1,2,3]输出:6示例 2:输入:nums = [1,2,3,4]输出:24示例 3:输入:nums = [-1,-2,-3]输出:-6提示:3 -1000