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 10 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)
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Avoid using static/global variables in coding problems as your code is tested
against multiple test cases and these tend to retain their previous values.
Passing the Sample/Custom Test cases in coding problems does not guarantee the
correctness of code. On submission, your code is tested against multiple test cases
consisting of all possible corner cases and stress constraints.
POTD
POTD
