PAT乙级 1093 字符串A+B (20 分) Java 实现

import java.io.*;

public class pat1093 {

	public static void main(String[] args) throws IOException{
		// TODO Auto-generated method stub
		BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
		String A = br.readLine();
		String B = A + br.readLine();
		boolean[] neverSee = new boolean[128];
		for(int i=0;i