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Grokking the Coding Interview Patterns in Python

Bus Routes

Explore how to solve the bus routes problem in graph theory by determining the least number of buses required to travel from a source to a destination station. Understand the problem constraints and implement an efficient solution using pattern-based coding techniques.

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Statement

You are given an array, routes, representing bus routes where routes[i] is a bus route that the ithi^{th} bus repeats forever. Every route contains one or more stations. You have also been given the source station, src, and a destination station, dest. Return the minimum number of buses someone must take to travel from src ...