Given a Date, return true if it falls on a Saturday or Sunday, and false otherwise. Return false for null input.
Example 1:
Input: inputDate = 2024-01-13
Output: true
Explanation: January 13, 2024 is a Saturday, so the result is true.
Example 2:
Input: inputDate = 2024-01-07
Output: true
Explanation: January 7, 2024 is a Sunday, so the result is true.
Example 3:
Input: inputDate = 2024-01-08
Output: false
Explanation: January 8, 2024 is a Monday, so the result is false.
Example 4:
Input: inputDate = null
Output: false
Explanation: A null date cannot be evaluated, so the result is false.
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