GetPoints.md

Get Points

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Implement the missing code, denoted by ellipses. You may not modify the pre-existing code.

A new scoring system was introduced in your university: from now on, each test will consist of the predefined list of questions, and for the i^th^ (1-based) question a student either gets i points, or loses p points as a penalty.

Your task is to calculate the number of points a student got for some test. Implement a function that would calculate the number of points received for the test based on the given list of answers.

Example

For answers = [true, true, false, true]and p = 2, the output should be
solution(answers, p) = 5.

Here's why: 1 + 2 - 2 + 4 = 5.

Input/Output

• [execution time limit] 4 seconds (py3)

• [input] array.boolean answers

  Array of student's answers. answers[i] is true if the student answered the (i + 1)^th^ question correctly, and false otherwise.

  Guaranteed constraints:
  1 ≤ answers.length ≤ 20.

• [input] integer p

  The number of points subtracted from the final score for each incorrect result.

  Guaranteed constraints:
  0 ≤ p ≤ 10.

• [output] integer

  The number of points the student received for the test.

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Solution

def solution(answers, p):
    questionPoints = lambda i, ans: i + 1 if ans else -p

    res = 0
    for i, ans in enumerate(answers):
        res += questionPoints(i, ans)
    return res

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