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Grokking the Coding Interview Patterns

Solution: Car Pooling

Explore how to solve the car pooling problem by simulating passenger changes over time using a difference array. This lesson helps you understand tracking overlapping intervals and ensuring capacity constraints are met efficiently.

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Statement

You are given a car with a fixed number of seats, denoted by an integer capacity. The car only travels in one direction — eastward — and does not make any U-turns.

You are also provided with an array, trips, where each element trips[i] =[numPassengersi,fromi,toi]= [\text{numPassengers}_i, \text{from}_i, \text{to}_i] ...