How to Solve Continuous Subarray Sum Problem
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Continuous Subarray Sum
Given an integer array nums and an integer k, return true if nums has a good subarray or false otherwise. A good subarray is a subarray where: its length is at least two, and the sum of the elements o...
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Understanding the Continuous Subarray Sum Problem
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Problem Statement
Given an integer array nums and an integer k, return true if nums has a good subarray or false otherwise. A good subarray is a subarray where: its length is at least two, and the sum of the elements of the subarray is a multiple of k. Note that: A subarray is a contiguous part of the array. An integer x is a multiple of k if there exists an integer n such that x = n * k. 0 is always a multiple of k.
Continuous Subarray Sum
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Examples
nums = [23,2,4,6,7], k = 6
true
[2, 4] is a continuous subarray of size 2 whose elements sum up to 6.
nums = [23,2,6,4,7], k = 6
true
[23, 2, 6, 4, 7] is an continuous subarray of size 5 whose elements sum up to 42. 42 is a multiple of 6 because 42 = 7 * 6 and 7 is an integer.
nums = [23,2,6,4,7], k = 13
false
Constraints
1 <= nums.length <= 105
0 <= nums[i] <= 109
0 <= sum(nums[i]) <= 231 - 1
1 <= k <= 231 - 1
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