import java.util.Scanner;
import java.math.BigInteger;
public class Main {

	public static void main(String[] args) {
		// TODO 自動生成的方法存根
		Scanner in=new Scanner(System.in);
		while(in.hasNext())
		{
			String A=in.next();
			String B=in.next();
			System.out.println(new BigInteger(A,16).add(new BigInteger(B,16)).toString(16).toUpperCase());
		}
		in.close();
	}
		
	
}

Followed by:

• Java簡潔代碼，無視數字大小 (398)  曉若姬 2020-12-14 20:05:06 Problem 2057

---