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题目描述：给定一个数组，输出该数组前K小数（无需排序） 示例： Input: nums = {38, 61, 7, 87, 81, 18, 50, 55, 90, 26} K = 7 Output: result = {7, 18, 26, 38, 50, 55, 61} 题解： 这道题目有两种解题方法，一是使用排序的算法让数组从小到大排好序，然后依次输出数组的前K个整数。 这

题目链接：https://leetcode.com/problems/longest-palindromic-substring/ 题目描述：Given a string s, find the longest palindromic substring in s. You may assume that the maximum length of s is 1000. 给定一个字

题目链接： https://leetcode.com/problems/palindrome-number/description/ 题目描述： Determine whether an integer is a palindrome. Do this without extra space. 判断一个整数是否为回文整数。 题解： 先排除复数和非0的10的倍数。 随后从该整数

题目链接： https://leetcode.com/problems/longest-common-prefix/description/ 题目描述： Write a function to find the longest common prefix string amongst an array of strings. 编写一个函数以查找一个字符串数组中所有字符串的最长公共前

题目链接： https://leetcode.com/problems/3sum/description/ 题目描述： Given an array S of n integers, are there elements a, b, c in S such that a + b + c = 0? Find all unique triplets in the array wh

题目链接： https://leetcode.com/problems/find-anagram-mappings/description/ 题目描述： Given two lists Aand B, and B is an anagram of A. B is an anagram of A means B is made by randomizing the or

题目链接： https://leetcode.com/problems/merge-two-binary-trees/description/ 题目描述： Given two binary trees and imagine that when you put one of them to cover the other, some nodes of the two trees

题目链接： https://leetcode.com/problems/number-complement/description/ 题目描述： Given a positive integer, output its complement number. The complement strategy is to flip the bits of its binary repres

Problem In task scheduling, it is common to use a graphrepresentation with a node for each task and a directed edge from task ito task j if i is a precondition for j. This directedgraph depicts the