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Problem · Hash Table

Shipping Cost Calculator Part 1 - Fixed Per-Unit Price

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Problem statement

Calculate the total shipping cost for an online order. The cost depends on the destination country and the product, and in this first version every product has a single fixed cost per unit.

Inputs:

  • country: the destination country code for the order.
  • items: a String[] where each entry is "product,quantity".
  • rules: a String[] where each entry is "country,product,cost" giving the fixed per-unit cost of a product in a country.

For each ordered item, multiply its quantity by the per-unit cost for that product in the order's country, and sum across all items. Return the total as an integer.

Function

calculateShippingCost(country: String, items: String[], rules: String[]) → int

Examples

Example 1

country = "US"items = ["mouse,20", "laptop,5"]rules = ["US,mouse,550", "US,laptop,1000", "CA,mouse,750", "CA,laptop,1100"]return = 16000
Using US rates: mouse 20 x 550 = 11000, laptop 5 x 1000 = 5000. Total = 16000.

Example 2

country = "CA"items = ["mouse,20", "laptop,5"]rules = ["US,mouse,550", "US,laptop,1000", "CA,mouse,750", "CA,laptop,1100"]return = 20500
Using CA rates: mouse 20 x 750 = 15000, laptop 5 x 1100 = 5500. Total = 20500.

Constraints

  • items entries are "product,quantity" with integer quantity.
  • rules entries are "country,product,cost" with integer cost (per unit).
  • Use the per-unit cost for the order's country and each product.
  • Total = sum over items of quantity * cost; return as an integer.

More Stripe problems

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public int calculateShippingCost(String country, String[] items, String[] rules) {
  // write your code here
}
country"US"
items["mouse,20", "laptop,5"]
rules["US,mouse,550", "US,laptop,1000", "CA,mouse,750", "CA,laptop,1100"]
expected16000
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