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ProblemGiven four lists A, B, C, D of integer values, compute how many tuples (i, j, k, l) there are such that A[i] + B[j] + C[k] + D[l] is zero.To make problem a bit easier, all A, B, C, D have s...

ProblemGiven an array of integers and an integer k, you need to find the total number of continuous subarrays whose sum equals to k.Example 1:Input: nums = [1,1,1], k = 2Output: 2Note:The le...