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Given an integer **x,** find the square root of x. If **x** is not a perfect square, then return floor(√x).

**Example 1:**

**Input:
**x = 5
**Output: **2**
Explanation: **Since, 5 is not a perfect
square, floor of square_root of 5 is 2.

**Example 2:**

**Input:
**x = 4
**Output: **2**
Explanation: **Since, 4 is a perfect
square, so its square root is 2.

**Your Task:**

You don't need to read input or print anything. The task is to complete the function **floorSqrt**() which takes x as the input parameter and return its square root.

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

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

**Constraints:**

1 ≤ x ≤ 10^{7}

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Square root

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