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1 """ 2 Given 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. 3 T 阅读全文
摘要：
1 """ 2 Write an efficient algorithm that searches for a value in an m x n matrix. This matrix has the following properties: 3 Integers in each row ar 阅读全文
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1 """ 2 Given an array nums containing n + 1 integers where each integer is between 1 and n (inclusive), prove that at least one duplicate number must 阅读全文
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1 """ 2 Given an unsorted array nums, reorder it such that nums[0] < nums[1] > nums[2] < nums[3].... 3 Example 1: 4 Input: nums = [1, 5, 1, 1, 6, 4] 5 阅读全文