{ "data": { "question": { "questionId": "3702", "questionFrontendId": "3411", "categoryTitle": "Algorithms", "boundTopicId": 3037799, "title": "Maximum Subarray With Equal Products", "titleSlug": "maximum-subarray-with-equal-products", "content": "
You are given an array of positive integers nums
.
An array arr
is called product equivalent if prod(arr) == lcm(arr) * gcd(arr)
, where:
prod(arr)
is the product of all elements of arr
.gcd(arr)
is the GCD of all elements of arr
.lcm(arr)
is the LCM of all elements of arr
.Return the length of the longest product equivalent subarray of nums
.
\n
Example 1:
\n\nInput: nums = [1,2,1,2,1,1,1]
\n\nOutput: 5
\n\nExplanation:
\n\nThe longest product equivalent subarray is [1, 2, 1, 1, 1]
, where prod([1, 2, 1, 1, 1]) = 2
, gcd([1, 2, 1, 1, 1]) = 1
, and lcm([1, 2, 1, 1, 1]) = 2
.
Example 2:
\n\nInput: nums = [2,3,4,5,6]
\n\nOutput: 3
\n\nExplanation:
\n\nThe longest product equivalent subarray is [3, 4, 5].
Example 3:
\n\nInput: nums = [1,2,3,1,4,5,1]
\n\nOutput: 5
\n\n
Constraints:
\n\n2 <= nums.length <= 100
1 <= nums[i] <= 10
给你一个由 正整数 组成的数组 nums
。
如果一个数组 arr
满足 prod(arr) == lcm(arr) * gcd(arr)
,则称其为 乘积等价数组 ,其中:
prod(arr)
表示 arr
中所有元素的乘积。gcd(arr)
表示 arr
中所有元素的最大公因数 (GCD)。lcm(arr)
表示 arr
中所有元素的最小公倍数 (LCM)。返回数组 nums
的 最长 乘积等价 子数组 的长度。
\n\n
示例 1:
\n\n输入: nums = [1,2,1,2,1,1,1]
\n\n输出: 5
\n\n解释:
\n\n最长的乘积等价子数组是 [1, 2, 1, 1, 1]
,其中 prod([1, 2, 1, 1, 1]) = 2
, gcd([1, 2, 1, 1, 1]) = 1
,以及 lcm([1, 2, 1, 1, 1]) = 2
。
示例 2:
\n\n输入: nums = [2,3,4,5,6]
\n\n输出: 3
\n\n解释:
\n\n最长的乘积等价子数组是 [3, 4, 5]
。
示例 3:
\n\n输入: nums = [1,2,3,1,4,5,1]
\n\n输出: 5
\n\n\n
提示:
\n\n2 <= nums.length <= 100
1 <= nums[i] <= 10
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