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[LeetCode] 523. Continuous Subarray Sum

523. Continuous Subarray Sum Medium Given an integer array nums and an integer k, return true if nums has a continuous subarray of size at least two whose elements sum up to a multiple of k, or false otherwise. 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. Example 1: Input: nums = [23,2,4,6,7], k = 6 Output: true Explanation: [2, 4..