Problema
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.
Vincoli
0 ≤ length ≤ 1,000; 0 ≤ each price ≤ 100,000; 0 ≤ discount_percent ≤ 100
Esempi
Input:
prices = [40, 35, 25]
discount_percent = 10
discount_threshold = 100
Output atteso:
expected = 90.0Input:
std::vector<long long> prices = {40, 35, 25};
long long discount_percent = 10;
long long discount_threshold = 100;
Output atteso:
double expected = 90.0;Input:
long[] prices = new long[] {40, 35, 25};
long discount_percent = 10;
long discount_threshold = 100;
Output atteso:
double expected = 90.0;Spiegazione
The total is 100, which reaches the threshold, so 10% off: 90.
Input:
prices = [20, 30]
discount_percent = 10
discount_threshold = 100
Output atteso:
expected = 50.0Input:
std::vector<long long> prices = {20, 30};
long long discount_percent = 10;
long long discount_threshold = 100;
Output atteso:
double expected = 50.0;Input:
long[] prices = new long[] {20, 30};
long discount_percent = 10;
long discount_threshold = 100;
Output atteso:
double expected = 50.0;Spiegazione
The total 50 is below 100, so no discount: 50.
Come affrontarlo
Prova prima da solo, poi apri un suggerimento alla volta.
Suggerimento 1
Trova prima il totale del carrello prima di qualsiasi sconto.
Suggerimento 2
Applica la riduzione percentuale solo quando il totale raggiunge la soglia.
Suggerimento 3
Assicurati che lo sconto sia sull’ordine completo, non su ogni articolo separatamente.
Complessità attesa
tempo O(n), spazio aggiuntivo O(1)
Riferimenti
Questa sfida è adattata per CodeUtility. Segui la traccia e i vincoli sopra.