[BOJ] 2935 소음 (JAVA)

https://www.acmicpc.net/problem/2935

2935번: 소음

import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.math.BigInteger;

public class Main {

    public static void main(String[] args) throws Exception {

        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
        BigInteger a = new BigInteger(br.readLine());
        char c = br.readLine().charAt(0);
        if (c == '*') System.out.print(a.multiply(new BigInteger(br.readLine())));
        else System.out.print(a.add(new BigInteger(br.readLine())));

    }

}