ZZULIOJ 1151: 大整数加法，Java

import java.io.*;
import java.math.BigInteger;
import java.util.Scanner;
public class Main {
    static Scanner cin = new Scanner(System.in);
    static BufferedWriter bw = new BufferedWriter(new OutputStreamWriter(System.out));
    public static void main(String[] args) throws IOException{
        int T=cin.nextInt();
        while(T-->0)
        {
            BigInteger a=cin.nextBigInteger();
            BigInteger b=cin.nextBigInteger();
            bw.write(a.add(b)+"n");
        }
        bw.flush();
    }
}