Given a number N, check if a number is perfect or not. A number is said to be perfect if sum of all its factors excluding the number itself is equal to the number.

Example 1:

Input:N = 6Output:1 Explanation:Factors of 6 are 1, 2, 3 and 6.
Excluding 6 their sum is 6 which
is equal to N itself. So, it's a
Perfect Number.

Example 2:

Input:N = 10Output:0Explanation:Factors of 6 are 1, 2, 5 and 10.
Excluding 10 their sum is 8 which
is not equal to N itself. So, it's
not a Perfect Number.

Your Task:
You don't need to read input or print anything. Your task is to complete the function isPerfectNumber() which takes an Integer N as input and returns 1 if N is a Perfect number else returns 0.

Expected Time Complexity: O(sqrt(N)) Expected Auxiliary Space: O(1)