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Given a string containing only digits, restore it by returning all possible valid IP address combinations.For example:Given "25525511135",return ["255.255.11.135", "255.255.111.35"]. (Order

Given a set of candidate numbers (C) and a target number (T), find all unique combinations in C where the candidate numbers sums to T. The same repeated number may be chosen from C unlimited num

Given n pairs of parentheses, write a function to generate all combinations of well-formed parentheses.For example, given n = 3, a solution set is:"((()))", "(()())", "(())()", "()(())", "()()

The n-queens puzzle is the problem of placing n queens on an n×n chessboard such that no two queens attack each other.Given an integer n, return all distinct solutions to the n-queens puzzle.

package test; import java.util.Scanner; public class Main { private static Scanner sc; public static void main(String[] args) { sc = new Scanner(System.in); int line = sc.

在学习Android开发的过程你，你往往会去借鉴别人的应用是怎么开发的，那些漂亮的动画和精致的布局可能会让你爱不释手，作为一个开发者，你可能会很想知道这些效果界面是怎么去实现的，这时，你便可以对改应用的APK进行反编译查看。下面是我参考了一些文章后简单的教程详解。（注：反编译不是让各位开发者去对一个应用破解搞重装什么的，主要目的是为了促进开发者学习，借鉴好的代码，提升自我开发水平。）