[java 백준] 브론즈 3/ 10824번 네 수

https://www.acmicpc.net/problem/10824

10824번: 네 수

import java.io.IOException;
import java.util.Scanner;
 
public class Main {
 
    public static void main(String[] args) throws NumberFormatException, IOException {
        Scanner sc = new Scanner(System.in);
        String A = sc.next();
        String B = sc.next();
        String C = sc.next();
        String D = sc.next();
        String a = A.concat(B);
        String b = C.concat(D);
        long a1 = Long.parseLong(a);
        long b1 = Long.parseLong(b);
        System.out.println(a1 + b1);
 
    }
 
}