백준 7단계 no.8

import java.math.BigInteger;
import java.util.*;

public class Main {

    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);

        BigInteger a = sc.nextBigInteger();
        BigInteger b = sc.nextBigInteger();

        System.out.println(a.add(b));
    }
}