A number k is called a square number if for some value of d > 1, k % (d*d) = 0.
Given a number N, find the total number of positive square numbers less than or equal to N.
Input: N = 3 Output: 0 Explanation: There are no square numbers which are less than or equal to 3.
Input: N = 4 Output: 1 Explanation: 4 is the only square number less than or equal to 4. 4 is divisible by (2*2).
You don't need to read input or print anything. Your task is to complete the function sqNum() which takes an Integer N as input and returns the number of square numbers less tha or equal to N.
Expected Time Complexity: O(sqrt(N)*log(N) )
Expected Auxiliary Space: O(sqrt(N))
1 <= N <= 109
We strongly recommend solving this problem on your own before viewing its editorial. Do you still want to view the editorial?Yes