源来如此

ideaif we could know the index of each character which is in the original string,the problem will be solved easily.Now we need to find the regulationin the conversion process by some example.examp

给定一个整型数组，从中选出三个数a,b,c满足a+b+c=0，求出所有且不重复的组合，组合内三个三个数不区分顺序。我自己裸写了一个方法，能求出来，但是因为比较繁琐，提交到LeetCode上超时了。代码清单如下：        import java.util.*;/** * @author zhaotian * @date 2018/6/13 16:36 *//** * 给定一个包...