题解 | #高精度整数加法#

import java.util.Scanner;
import java.math.BigInteger;
// 注意类名必须为 Main, 不要有任何 package xxx 信息
public class Main {
    public static void main(String[] args) {
        Scanner in = new Scanner(System.in);
        BigInteger a = in.nextBigInteger();
        BigInteger b = in.nextBigInteger();
        System.out.println(a.add(b));
    }
}