题目地址：https://leetcode.com/problems/rotate-array/ 题解地址：https://leetcode.com/articles/rotate-array/ 题目Given an array, rotate the array to the right by ...

Fibonacci Number - LeetCode 题目The Fibonacci numbers, commonly denoted F(n) form a sequence, called the Fibonacci sequence, such that each number is t ...

Pow(x, n) - LeetCode 题目Implement pow(x, n), which calculates x raised to the power n (xn). Example 1: 12Input: 2.00000, 10Output: 1024.00000 Example ...

Write a function that takes an unsigned integer and return the number of ‘1’ bits it has (also known as the Hamming weight). Example 1: 123Input: 000 ...

题目来源：https://leetcode.com/problems/integer-break/ 题目难度：Medium 题目Given a positive integer n, break it into the sum of at least two positive integers a ...

题目来源：https://leetcode.com/problems/longest-palindromic-substring/ 题目难度：Medium 题目Given a string s, find the longest palindromic substring in s. You ma ...

题目来源： 题目难度：Hard 题目There are two sorted arrays nums1 and nums2 of size m and n respectively. Find the median of the two sorted arrays. The overall run ...

官方文档：SQLite Home Page 自增主键自增主键必须是 INTEGER PRIMARY KEY，INT PRIMARY KEY 都不行。 1234567Caused by: org.sqlite.SQLiteException: [SQLITE_ERROR] SQL error or ...

概念Java Thread 类相关Thread.sleep()RunnableCallablesynchronized 方法synchronized 关键字只能用于修饰方法和代码块，而且不能用于修饰构造方法。 参考 Java Language Specification Chapter 17. T ...