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Consider a sample space S consisting of all perfect squares starting from 1, 4, 9 and so on. You are given a number **N**, you have to output the number of integers less than N in the sample space S.

**Example 1:**

Input :N =9Output:2Explanation:1 and 4 are the only Perfect Squares less than 9. So, the Output is 2.

**Example 2:**

Input :N =3Output:1Explanation:1 is the only Perfect Square less than 3. So, the Output is 1.

**Your Task:**

You don't need to read input or print anything. Your task is to complete the function **countSquares()** which takes an Integer N as input and returns the answer.

**Expected Time Complexity:** O(sqrt(N))

**Expected Auxiliary Space:** O(1)

**Constraints:**

1 <= N <= 10^{8}

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Count Squares

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