题目 Write a function that takes a string as input and reverse only the vowels of a string. Example 1: Given s =…

题目 Given two binary trees and imagine that when you put one of them to cover the other, some nodes of the two …

题目 Given a binary tree, you need to compute the length of the diameter of the tree. The diameter of a binary t…

题目 Given numRows, generate the first numRows of Pascal’s triangle. For example, given numRows = 5, Retur…

题目 We define a harmonious array is an array where the difference between its maximum value and its minimum val…

题目 Calculate the sum of two integers a and b, but you are not allowed to use the operator + and -. Example: Gi…

马上写了30道题目了，使用golang写起题目来代码简洁明了，还可以非常方便的写测试用例，加上Goland可以进行调试，有如神助。 但无论如何，写了测试就会依赖测试判断对错，用了debug就会依赖debug来寻找出错的地…

题目 Say you have an array for which the ith element is the price of a given stock on day i. If you were only pe…

题目 The set S originally contains numbers from 1 to n. But unfortunately, due to the data error, one of the num…

题目 Given a string and an integer k, you need to reverse the first k characters for every 2k characters countin…

题目 Given an index k, return the kth row of the Pascal’s triangle. For example, given k = 3, Return [1,3,…

题目 Say you have an array for which the ith element is the price of a given stock on day i. Design an algorithm…