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Decode the Coding Interview in C#: Real-World Examples

Gas Station

Explore how to solve the gas station problem by identifying the starting point for a circular trip given gas and cost arrays. This lesson teaches you to implement an O(n) time and O(1) space solution using an approach that tracks available gas and updates starting positions, helping you understand problem-solving strategies applicable in technical interviews.

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Description

Suppose there are n gas stations identified by integers 0, 1, . . ., n-1, where the amount of gas at the ithi^{th} station is gas[i]. Imagine that these gas stations are arranged clockwise in a circle, as shown below.

You have a car with an unlimited gas tank. It costs cost[i] amount of gas to travel from the ithi^{th} station to the (i+1)th(i + 1)^{th} ...