Hackerrank Java BigInteger Solution

In this problem, you have to add and multiply huge numbers! These numbers are so big that you can't contain them in any ordinary data types like a long integer.

Use the power of Java's BigInteger class and solve this problem.

Input Format

There will be two lines containing two numbers,  and .

Constraints

and  are non-negative integers and can have maximum  digits.

Output Format

Output two lines. The first line should contain , and the second line should contain . Don't print any leading zeros.

Sample Input

1234
20

Sample Output

1254
24680

Explanation

Solution in java8

Approach 1.

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Approach 2.

import java.io.*;
import java.util.*;
import java.math.*;

public class Solution {

    public static void main(String[] args) {
        Scanner scan = new Scanner(System.in);
        BigInteger a = new BigInteger(scan.next());
        BigInteger b = new BigInteger(scan.next());
        System.out.println(a.add(b));
        System.out.println(a.multiply(b));
    }
}

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Approach 3.

import java.io.*;
import java.util.*;
import java.math.*;

public class Solution {

    public static void main(String[] args) {
        /* Enter your code here. Read input from STDIN. Print output to STDOUT. Your class should be named Solution. */
        Scanner in = new Scanner(System.in);
        BigInteger a = in.nextBigInteger();
        BigInteger b = in.nextBigInteger();
        System.out.println(a.add(b));
        System.out.println(a.multiply(b));
    }
}

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