摘要：
You have some number of sticks with positive integer lengths. These lengths are given as an array sticks, where sticks[i] is the length of the ith sti 阅读全文
摘要：
You are given two string arrays username and website and an integer array timestamp. All the given arrays are of the same length and the tuple [userna 阅读全文
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There are n cities labeled from 1 to n. You are given the integer n and an array connections where connections[i] = [xi, yi, costi] indicates that the 阅读全文
摘要：
Given the root of a binary tree, return the maximum average value of a subtree of that tree. Answers within 10-5 of the actual answer will be accepted 阅读全文