This is easy hackerrank challenge which will help you to become pro at competitive programming. There are various competitive programming websites in one of them is HackerRank .
HackerRank Algorithm Implementaton Problems Solutions.
We will solve Today Sherlock's home hackerrank solution in Java And Python.

Problem :

Watson likes to challenge Sherlock’s math ability. He will provide a starting and ending value describing a range of integers. Sherlock must determine the number of square integers within that range, inclusive of the endpoints.

Note: A square integer is an integer which is the square of an integer, e.g. 1, 4, 9, 16, 25.

For example, the range is a = 24 and b = 49, inclusive. There are three square integers in the range: 25, 36 and 49.

Read full problem : Sherlock and Squares.

Solution :

JAVA 7 Solution 

public static int squares(int a, int b) {
        int count = 0;
        int i = a;
        while (i <= b) {
            int sqrt = (int) Math.sqrt(i);
            if (Math.pow(sqrt, 2) == i) {
            i = (int) Math.pow(sqrt + 12);
        return count;

python Solution

def squares(a, b): return int(b**0.5)-int((a-1)**0.5)