Problème
Add up the prices in the cart. If the total is at least discount_threshold, take discount_percent percent off the whole total.
Implement cart_total(prices, discount_threshold, discount_percent).
Input
prices: The item prices. discount_threshold: The total that unlocks the discount. discount_percent: The discount in percent.
Output
Return the amount to pay.
Contraintes
0 ≤ length ≤ 1,000; 0 ≤ each price ≤ 100,000; 0 ≤ discount_percent ≤ 100
Exemples
Entrée :
prices = [40, 35, 25]
discount_percent = 10
discount_threshold = 100
Sortie attendue :
expected = 90.0Entrée :
std::vector<long long> prices = {40, 35, 25};
long long discount_percent = 10;
long long discount_threshold = 100;
Sortie attendue :
double expected = 90.0;Entrée :
long[] prices = new long[] {40, 35, 25};
long discount_percent = 10;
long discount_threshold = 100;
Sortie attendue :
double expected = 90.0;Explication
The total is 100, which reaches the threshold, so 10% off: 90.
Entrée :
prices = [20, 30]
discount_percent = 10
discount_threshold = 100
Sortie attendue :
expected = 50.0Entrée :
std::vector<long long> prices = {20, 30};
long long discount_percent = 10;
long long discount_threshold = 100;
Sortie attendue :
double expected = 50.0;Entrée :
long[] prices = new long[] {20, 30};
long discount_percent = 10;
long discount_threshold = 100;
Sortie attendue :
double expected = 50.0;Explication
The total 50 is below 100, so no discount: 50.
Comment l'aborder
Essayez d'abord seul, puis ouvrez les indices un par un.
Indice 1
Commence par calculer le total du panier avant toute remise.
Indice 2
Applique la réduction en pourcentage seulement si le total atteint le seuil.
Indice 3
Assure-toi que la remise porte sur toute la commande, pas article par article.
Complexité attendue
temps O(n), espace supplémentaire O(1)
Références
Ce défi a été adapté pour CodeUtility. Suivez l'énoncé et les contraintes ci-dessus.