Sherlock and Squares Hackerrank Solution - java

Sherlock and Squares Hackerrank Solution - java

For explanation watch video ::

Code::

import java.io.*;

import java.math.*;

import java.security.*;

import java.text.*;

import java.util.*;

import java.util.concurrent.*;

import java.util.function.*;

import java.util.regex.*;

import java.util.stream.*;

import static java.util.stream.Collectors.joining;

import static java.util.stream.Collectors.toList;

class Result {

    public static int squares(int a, int b) {

        int first = (int)Math.ceil(Math.sqrt(a));

        int last = (int)Math.floor(Math.sqrt(b));

        return last - first +1;

    }

}

public class Solution {

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

        BufferedReader bufferedReader = new BufferedReader(new InputStreamReader(System.in));

        BufferedWriter bufferedWriter = new BufferedWriter(new FileWriter(System.getenv("OUTPUT_PATH")));

        int q = Integer.parseInt(bufferedReader.readLine().trim());

        IntStream.range(0, q).forEach(qItr -> {

            try {

                String[] firstMultipleInput = bufferedReader.readLine().replaceAll("\\s+$", "").split(" ");

                int a = Integer.parseInt(firstMultipleInput[0]);

                int b = Integer.parseInt(firstMultipleInput[1]);

                int result = Result.squares(a, b);

                bufferedWriter.write(String.valueOf(result));

                bufferedWriter.newLine();

            } catch (IOException ex) {

                throw new RuntimeException(ex);

            }

        });

        bufferedReader.close();

        bufferedWriter.close();

    }

}