For an input year N, find whether the year is a leap or not.
Input: N = 4 Output: 1 Explanation: 4 is not divisible by 100 and is divisible by 4 so its a leap year
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
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)
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