How should I practice Longest Consistent Activity Streak?

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

Is Longest Consistent Activity Streak associated with Atlassian?

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

Longest Consistent Activity Streak

Atlassian● HardFULLTIMEPHONE SCREEN

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Problem statement

A consistent streak is a contiguous arithmetic sequence: every adjacent difference is equal. Replace at most one element with any integer and return the greatest possible streak length.

A nonempty array of length one has streak length one; no modification is required.

Function

longestConsistentStreak(activity: int[]) → int

Examples

Example 1

activity = [1,2,10,4,5]return = 5

Replace 10 with 3 to obtain difference one throughout.

Example 2

activity = [1,2,3,8,9,10]return = 4

One replacement can extend either arithmetic run by one.

Constraints

1 <= activity.length <= 200000.
Values fit signed 32-bit integers; replacements may be any integer.

Source note: Author-written prompt excerpt retained for source fidelity.