How should I practice Can Three Numbers Form a Valid Date??

Start by reading the full statement, solve the visible examples, then compare the pattern against related Google phone screen problems in FastPrep.

Is Can Three Numbers Form a Valid Date? associated with Google?

FastPrep tags this as a Google phone screen coding practice problem when the problem catalog has that company and stage context.

Can Three Numbers Form a Valid Date?

Google● EasyNEW GRADPHONE SCREEN

Learn

Problem statement

Given three positive integers, decide whether some permutation can represent a valid Gregorian date [year,month,day].

The year must be in [1,9999]. Apply ordinary Gregorian leap-year rules: divisible by 400, or divisible by 4 but not 100. Each input number is used exactly once.

Function

canFormValidDate(values: int[]) → boolean

Examples

Example 1

values = [2024,2,29]return = true

2024 is a leap year, so February 29 is valid.

Example 2

values = [31,4,2024]return = false

No permutation forms a valid date because April has only 30 days and the other placements fail month/year bounds.

Example 3

values = [12,25,2025]return = true

The permutation [2025,12,25] is valid.

Constraints

values.length = 3.
1 <= values[i] <= 9999.