Task Scheduler
Detailed guide and Python implementation for the 'Task Scheduler' problem.
Problem Statement
You are given an array of CPU tasks, each represented by a letter A to Z, and a cooling interval n. Each cycle or interval allows the completion of one task. Tasks can be completed in any order, but there's a constraint: identical tasks must be separated by at least n intervals due to cooling requirements.
Return the minimum number of intervals required to complete all tasks.
Write a function leastInterval(tasks: List[str], n: int) -> int.
- •1 <= len(tasks) <= 10^4
- •tasks[i] is an uppercase English letter
- •0 <= n <= 100
Examples
tasks = ["A","A","A","B","B","B"], n = 2
8
A possible sequence is A -> B -> idle -> A -> B -> idle -> A -> B.
tasks = ["A","A","A","B","B","B"], n = 0
6
With no cooling interval, tasks can be executed continuously without idles.
Need a Hint?
Edge Cases to Watch
- Empty input structures
- Single element inputs
- Large numerical bounds
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