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题目如下： Given an integer array of digits, return the largest multiple of three that can be formed by concatenating some of the given digits in any order 阅读全文
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题目如下： Given an integer num, find the closest two integers in absolute difference whose product equals num + 1 or num + 2. Return the two integers in a 阅读全文
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题目如下： You have n binary tree nodes numbered from 0 to n - 1 where node i has two children leftChild[i] and rightChild[i], return true if and only if a 阅读全文
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题目如下： Write a program to count the number of days between two dates. The two dates are given as strings, their format is YYYY-MM-DD as shown in the ex 阅读全文