Problème
With inheritance, a subclass reuses its parent's behaviour and adds its own. Every vehicle pays a toll; a truck is a vehicle that pays extra for its axles.
Each vehicle is one of:
motorbike: pays 2.car: pays 5.truck <axles>: pays the car rate 5, plus 3 for every axle beyond the first two.
Implement vehicle_tolls(vehicles).
Input
vehicles: The vehicles passing the toll gate.
Output
Return the total toll collected.
Contraintes
0 ≤ number of vehicles ≤ 100,000
2 ≤ axles ≤ 10
Exemples
Entrée :
vehicles = ["car", "motorbike", "truck 4"]
Sortie attendue :
expected = 18Entrée :
std::vector<std::string> vehicles = {"car", "motorbike", "truck 4"};
Sortie attendue :
long long expected = 18;Entrée :
string[] vehicles = new string[] {"car", "motorbike", "truck 4"};
Sortie attendue :
long expected = 18;Explication
5 + 2 + (5 + 3 × 2) = 18.
Entrée :
vehicles = ["truck 2", "truck 3"]
Sortie attendue :
expected = 13Entrée :
std::vector<std::string> vehicles = {"truck 2", "truck 3"};
Sortie attendue :
long long expected = 13;Entrée :
string[] vehicles = new string[] {"truck 2", "truck 3"};
Sortie attendue :
long expected = 13;Explication
A 2-axle truck pays just the car rate 5; a 3-axle truck pays 5 + 3 = 8. Total 13.
Comment l'aborder
Essayez d'abord seul, puis ouvrez les indices un par un.
Indice 1
Start from the car rate of 5 and adjust per vehicle type.
Indice 2
A truck pays extra only for axles beyond the first two.
Indice 3
Motorbikes override the base rule with a fixed 2.
Complexité attendue
O(number of vehicles) time, O(1) extra space
Références
Ce défi a été adapté pour CodeUtility. Suivez l'énoncé et les contraintes ci-dessus.