Intended to be used in an IntelliJ scratch pad.

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// Distance is assumed to be in whole km and volume in whole L
data class Refuel(val distance: Int, val volume: Int)

data class Vehicle(val odometer: Int, val trip: Int, val refuels: List<Refuel> = emptyList())

val vehicle = Vehicle(odometer = 25000, trip = 300, refuels = listOf(
    Refuel(distance = 700, volume = 33),
    Refuel(distance = 1100, volume = 48)
))

// A user may register in between refueling. To combat this, subtract the trip meter that was
// recorded during the registration
val originalOdometer = vehicle.odometer - vehicle.trip
val currentOdometer = originalOdometer + vehicle.refuels.sumOf { it.distance }
val totalVolume = vehicle.refuels.sumOf { it.volume }

originalOdometer
currentOdometer
totalVolume