read the following two links: http://www.programmerinterview.com/index.php/database-sql/difference-between-a-l…

  Given a binary search tree with non-negative values, find the minimum absolute difference bet…

  Given an array with n integers, your task is to check if it could become non-decreasing by mo…

  We are given an array A of positive integers, and two positive integers L and …

H-Index Given an array of citations (each citation is a non-negative integer) of a researcher, write a functio…

题目描述 Given an array S of n integers, are there elements a, b, c, and d in S such that a + b + c + d = target? …

Python 3 实现： 源代码已上传 Github，持续更新。 """ 88. Merge Sorted Array Given two sorted integer arrays nums1 and nums2, m…

这个错误真的让我想弃用Android Studio, 解决办法是把程序里所有有R的地方先注释掉，然后 Build —> Make project，就好了。

验证大小中括号是否成对闭合匹配 Valid Parentheses 验证大小中括号是否成对闭合匹配。 Given a string containing just the characters ‘(̵…

99. Recover Binary Search Tree 题目 Two elements of a binary search tree (BST) are swapped by mistake. Recover t…

  Given an array of integers where 1 ≤ a[i] ≤ n (n = size of array), some elements appear …

  Given a word, you need to judge whether the usage of capitals in it is right or not. We define the usag…