2022年5月2日ACM

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

public static void main(String[] args) {
    start();
}

private static void start() {
    method();
}

private static BigInteger add(BigInteger x,BigInteger y) {
    return x.add(y);    
}

private static void method() {
    try {
        Scanner scanner = new Scanner(System.in);
        
        BigInteger first = scanner.nextBigInteger();
        BigInteger second = scanner.nextBigInteger();

        System.out.print(add(first, second));
    } catch (Exception e) {
        // TODO: handle exception
        System.out.print(e);
    }
    
}

}