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 sc = new Scanner(System.in);
        String str1 = sc.nextLine();
        String str2 = sc.nextLine();
        BigInteger b1 = new BigInteger(str1);
        BigInteger b2 = new BigInteger(str2);
        BigInteger add = b1.add(b2);
        System.out.println(add);
    }
}