LeetCode 2362: Generate the Invoice Solution

Master LeetCode problem 2362 (Generate the Invoice), a hard challenge, with our optimized solutions in Java, C++, and Python. Explore detailed explanations, test your code in our interactive editor, and prepare for coding interviews.

2362. Generate the Invoice

Hard

Database

Problem Explanation

Explanation:

To generate the invoice, we need to calculate the total amount of each product purchased by a customer. The input data contains a list of products with their corresponding prices and quantities. We need to create an invoice for each product showing the total amount to be paid by the customer.

Create a hashmap to store the total amount for each product.
Iterate through the list of products and update the total amount in the hashmap.
Generate the invoice for each product using the product name, price, quantity, and total amount.

Time Complexity:

The time complexity of this solution is O(n), where n is the number of products in the input list.

Space Complexity:

The space complexity of this solution is O(n) to store the total amount for each product.

Solution Code

import java.util.HashMap;
import java.util.List;
import java.util.Map;

public class InvoiceGenerator {
    public Map<String, Double> generateInvoice(List<String> products, List<Double> prices, List<Integer> quantities) {
        Map<String, Double> invoices = new HashMap<>();
        
        for (int i = 0; i < products.size(); i++) {
            String product = products.get(i);
            double price = prices.get(i);
            int quantity = quantities.get(i);
            
            double totalAmount = price * quantity;
            invoices.put(product, totalAmount);
        }
        
        return invoices;
    }
}

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