코딩테스트 3번 - Array(1, 2차원 배열)

package main;

import java.util.ArrayList;
import java.util.Scanner;


public class Main {

	public char[] solu(int a,int [] arr1,int [] arr2) {

		char [] who = new char[a];
	for(int i = 0; i < a; i ++) {
		if((arr1[i]== 1) && (arr2[i] == 3) || (arr1[i]== 2) && (arr2[i] == 1)|| (arr1[i]== 3) && (arr2[i] == 2) ) {
			who[i] = 'A';
		}else if ((arr1[i]== 1) && (arr2[i] == 2) || (arr1[i]== 2) && (arr2[i] == 3)|| (arr1[i]== 3) && (arr2[i] == 1)) {
			who[i] = 'B';
		}else {
			who [i] = 'D';
		}
		
	}
			
		
		
		
	return who;
	}
		
	
	
	
	public static void main(String[] args) {
		
	
	
	Main main = new Main();
	
	
	
	
	Scanner scan = new Scanner(System.in);
	
	int a = scan.nextInt();
	int[] arr1 = new int[a];
	int[] arr2 = new int[a];
	
	for(int i =0 ; i < a; i ++) {
		arr1[i] = scan.nextInt();
		
	}
	for(int i =0 ; i < a; i ++) {
		arr2[i] = scan.nextInt();
		
	}
	
	
	
	
	System.out.println(main.solu(a,arr1,arr2));
	

	

	}
	
	
	

	
	}