Add Two Very Large Numbers in Java | AskTheCode

Java program to add two huge numbers | Basic Java Programming Solutions | AskTheCode

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Problem:

Given a series of integer pairs A and B, output the sum of A and B.

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Input Format:

Each line contains two integers, A and B. One input file may contain several pairs P

where 0 <= P <= 12.

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Output Format:

Output a single integer per line - The sum of A and B.

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Constraints:

0 <= A, B <= 10^98

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Sample Input:

1 2
2 5
10 14

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Sample Output:

3
7
24

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Discussion:

The Constraints tells us that it's not possible to use integers or long data types here, because the length of A and B can be 10^98, wiz. beyond the range of any of int, float, double and long.

So, we will store the input in Strings.

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Code:

//imports for BufferedReader*/
import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.math.BigInteger;

// Warning: Printing unwanted or ill-formatted data to output will cause the test cases to fail
class Solution{
	public static void main(String args[] ) throws Exception {
        	/*BufferedReader*/
        	BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
        	String input = "";

 		while((input = br.readLine()) != null){
        		String val1 = input.split(" ", 0)[0];
        		String val2 = input.split(" ", 0)[1];
        		BigInteger a = new BigInteger(val1);
        		BigInteger b = new BigInteger(val2);
        		BigInteger res = a.add(b);
        		System.out.println(res);
 		}
 	}
}

Note: There can be other ways of dealing with this problem. But, solving problem using this

method required less lines of code to write.