Grokking the Coding Interview: Patterns for Coding Questions
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Tasks Scheduling (medium)
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Problem Statement

There are ‘N’ tasks, labeled from ‘0’ to ‘N-1’. Each task can have some prerequisite tasks which need to be completed before it can be scheduled.

Given the number of tasks and a list of prerequisite pairs, find out if it is possible to schedule all the tasks.

Examples

Example 1:

Input: Tasks=6, Prerequisites=[2, 5], [0, 5], [0, 4], [1, 4], [3, 2], [1, 3]
Output: true
Explanation: A possible scheduling of tasks is: [0 1 4 3 2 5]

Example 2:

Input: Tasks=3, Prerequisites=[0, 1], [1, 2]
Output: true
Explanation: To execute task '1', task '0' needs to finish first. Similarly, task '1' needs to finish before '2' can be scheduled. One possible scheduling of tasks is: [0, 1, 2]

Example 3:

Input: Tasks=3, Prerequisites=[0, 1], [1, 2], [2, 0]
Output: false
Explanation: The tasks have a cyclic dependency, therefore they cannot be scheduled.

Try it yourself

Try solving this question here:

Python3
Python3
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