Additive equations Time Limit : 20000/10000ms (Java/Other) Memory Limit : 65536/32768K (Java/Other) Total Submission(s) : 22 Accepted Submission(s) : 12 Problem Description We all understand that an integer set is a collection of distinct int
package com.lanxi.demo2; import java.util.HashSet; import java.util.Iterator; import java.util.Set; public class Test { public static void main(String[] args) { //引用一个Set集合实现类 Set set=new HashSet(); //添加单个元素 set.add("哈"); set.add("士");