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Grokking the Coding Interview Patterns in C++

Solution: Car Pooling

Explore how to solve the car pooling problem by simulating passenger pickups and drop-offs using a timeline and difference arrays. Understand how to track capacity changes efficiently and ensure the car never exceeds its seat limit while handling multiple overlapping trips.

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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] represents a group of numPassengersi\text{numPassengers}_i that must be picked up at location fromi\text{from}_i and dropped off at location toi\text{to}_i ...