You are given a 0-indexed integer array nums representing the score of students in an exam. The teacher would like to form one non-empty group of students with maximal strength, where the strength of a group of students of indices i0, i1, i2, ... , ik is defined as nums[i0] * nums[i1] * nums[i2] * ... * nums[ik].
Return the maximum strength of a group the teacher can create.
\n\n\n
Example 1:
\n\n\nInput: nums = [3,-1,-5,2,5,-9]\nOutput: 1350\nExplanation: One way to form a group of maximal strength is to group the students at indices [0,2,3,4,5]. Their strength is 3 * (-5) * 2 * 5 * (-9) = 1350, which we can show is optimal.\n\n\n
Example 2:
\n\n\nInput: nums = [-4,-5,-4]\nOutput: 20\nExplanation: Group the students at indices [0, 1] . Then, we’ll have a resulting strength of 20. We cannot achieve greater strength.\n\n\n
\n
Constraints:
\n\n1 <= nums.length <= 13-9 <= nums[i] <= 9给你一个下标从 0 开始的整数数组 nums ，它表示一个班级中所有学生在一次考试中的成绩。老师想选出一部分同学组成一个 非空 小组，且这个小组的 实力值 最大，如果这个小组里的学生下标为 i0, i1, i2, ... , ik ，那么这个小组的实力值定义为 nums[i0] * nums[i1] * nums[i2] * ... * nums[ik] 。
请你返回老师创建的小组能得到的最大实力值为多少。
\n\n\n\n
示例 1：
\n\n输入：nums = [3,-1,-5,2,5,-9]\n输出：1350\n解释：一种构成最大实力值小组的方案是选择下标为 [0,2,3,4,5] 的学生。实力值为 3 * (-5) * 2 * 5 * (-9) = 1350 ，这是可以得到的最大实力值。\n\n\n
示例 2：
\n\n输入：nums = [-4,-5,-4]\n输出：20\n解释：选择下标为 [0, 1] 的学生。得到的实力值为 20 。我们没法得到更大的实力值。\n\n\n
\n\n
提示：
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