For an input year N, find whether the year is a leap or not.

Example 1:
Input:
N = 4
Output:
1
Explanation:
4 is not divisible by 100
and is divisible by 4 so its
a leap year
Example 2:
Input:
N = 2021
Output:
0
Explanation:
2021 is not divisible by 100
and is also not divisible by 4
so its not a leap year
Your Task:
You don't need to read input or print anything. Your task is to complete the function isLeap() which takes an integer N as input parameter and returns 1 is N is a leap year and 0 otherwise.

Expected Time Complexity: O(1)
Expected Space Complexity: O(1)
Constraints:
1<=N<=9999

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