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fareEstimator.md

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Fare Estimator

Uber is building a Fare Estimator that can tell you how much your ride will cost before you request it. It works by passing approximated ride distance and ride time through this formula:

(Cost per minute) * (ride time) + (Cost per mile) * (ride distance)

where Cost per minute and Cost per mile depend on the car type.

You are one of the engineers building the Fare Estimator, so knowing cost per minute and cost per mile for each car type, as well as ride distance and ride time, return the fare estimates for all car types.

Example

For
ride_time = 30,
ride_distance = 7,
cost_per_minute = [0.2, 0.35, 0.4, 0.45], and
cost_per_mile = [1.1, 1.8, 2.3, 3.5], the output should be
solution(ride_time, ride_distance, cost_per_minute, cost_per_mile) = [13.7, 23.1, 28.1, 38].

Since:

30 * 0.2 + 7 * 1.1 = 6 + 7.7 = 13.7
30 * 0.35 + 7 * 1.8 = 10.5 + 12.6 = 23.1
30 * 0.4 + 7 * 2.3 = 12 + 16.1 = 28.1
30 * 0.45 + 7 * 3.5 = 13.5 + 24.5 = 38

Input/Output

  • [execution time limit] 4 seconds (py3)

  • [input] integer ride_time

    A positive integer, ride duration in minutes.

    Guaranteed constraints:
    10 ≤ ride_time ≤ 50.

  • [input] integer ride_distance

    A positive integer, ride distance in miles.

    Guaranteed constraints:
    5 ≤ ride_distance ≤ 20.

  • [input] array.float cost_per_minute

    cost_per_minute[i] is a positive number denoting cost per minute for the i^th^ car type. There are at least 4 car types in every city where Uber operates.

    Guaranteed constraints:
    4 ≤ cost_per_minute.length ≤ 10,
    0.1 ≤ cost_per_minute[i] ≤ 350.0.

  • [input] array.float cost_per_mile

    cost_per_mile[i] is a positive number denoting cost per mile for the i^th^ car type. It is guaranteed that cost_per_minute and cost_per_mile have the same number of elements.

    Guaranteed constraints:
    cost_per_mile.length = cost_per_minute.length,
    0.5 ≤ cost_per_mile[i] ≤ 7.0.

  • [output] array.float

    An array of estimated fares for each car type.

[Python 3] Syntax Tips

# Prints help message to the console
# Returns a string
def helloWorld(name):
    print("This prints to the console when you Run Tests")
    return "Hello, " + name

Solution

def solution(ride_time, ride_distance, cost_per_minute, cost_per_mile):
    res = []
    est = 0
    for i in range (len(cost_per_mile)):
        est = cost_per_minute[i] * ride_time + cost_per_mile[i] * ride_distance
        res.append(est)
    return res

See on app.codesignal.com