随笔分类 - 算法&Leetcode
摘要：Given two strings s and t, write a function to determine if t is an anagram of s.For example,s = "anagram", t = "nagaram", return true.s = "rat", t = ...
阅读全文
摘要：Given an array nums, write a function to move all 0's to the end of it while maintaining the relative order of the non-zero elements.For example, give...
阅读全文
摘要：Given two binary trees, write a function to check if they are equal or not.Two binary trees are considered equal if they are structurally identical an...
阅读全文
摘要：Given an integer array nums, find the sum of the elements between indices i and j (i ≤ j), inclusive.Example:Given nums = [-2, 0, 3, -5, 2, -1]sumRang...
阅读全文
摘要：Invert a binary tree. 4 / \ 2 7 / \ / \1 3 6 9to 4 / \ 7 2 / \ / \9 6 3 1比较简单，二叉树里的题其实有点举一反三的意思，很多题会一道就差不多了。递归的反...
阅读全文
摘要：Write a SQL query to delete all duplicate email entries in a table named Person, keeping only unique emails based on its smallest Id.+----+-----------...
阅读全文
摘要：Find the contiguous subarray within an array (containing at least one number) which has the largest product.For example, given the array [2,3,-2,4], t...
阅读全文
摘要：Given a binary tree, imagine yourself standing on the right side of it, return the values of the nodes you can see ordered from top to bottom.For exam...
阅读全文
摘要：You are a product manager and currently leading a team to develop a new product. Unfortunately, the latest version of your product fails the quality c...
阅读全文
摘要：Related to question Excel Sheet Column TitleGiven a column title as appear in an Excel sheet, return its corresponding column number.For example: A...
阅读全文
摘要：我发现最近做题，我总是被“阵势”唬住，不管什么题，就先觉得自己不会了，不想去思考，这种习惯比较可怕。其实任何难题，只要你学会分解它，并逐一击破，其实你发现你是可以解决的。就像这道题，一个是要“删去”非正常字符例如':空格呀什么的，最后要的只有数字和字符。所以要有一个函数判断是否有效isValid。还...
阅读全文
摘要：又一道二维数组上的题，昨天刚开始的时候leetcode上不去了，就去牛客上面随便瞅瞅，当时看着道题就觉得，有些难度，二维数组说实话我一看到就怂。题目描述在一个二维数组中，每一行都按照从左到右递增的顺序排序，每一列都按照从上到下递增的顺序排序。请完成一个函数，输入这样的一个二维数组和一个整数，判断数组...
阅读全文
摘要：对于Vector的用法，实在是知道的太少，算法思想比较简单，核心也就一行代码，但是实现错误就显示平时代码的不熟悉。Given numRows, generate the first numRows of Pascal's triangle.For example, given numRows = 5...
阅读全文
摘要：这应该是我自己做出来的第一道题，所以刚开始的时候把我激动坏了。Write a program to check whether a given number is an ugly number.Ugly numbers are positive numbers whose prime factors...
阅读全文
摘要：刚注册了leetcode，推荐的第一题就是Nim Game。You are playing the following Nim Game with your friend: There is a heap of stones on the table, each time one of you ta...
阅读全文