문제 출처: https://www.acmicpc.net/problem/10757
문제
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.math.BigInteger;
import java.util.StringTokenizer;
public class Main {
public static void main(String[] args) throws IOException {
BufferedReader reader = new BufferedReader(new InputStreamReader(System.in));
StringTokenizer tokenizer = new StringTokenizer(reader.readLine());
BigInteger num1 = new BigInteger(tokenizer.nextToken());
BigInteger num2 = new BigInteger(tokenizer.nextToken());
System.out.println(num1.add(num2));
}
}