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AP-1 > scoreUp
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The "key" array is an array containing the correct answers to an exam, like {"a", "a", "b", "b"}. the "answers" array contains a student's answers, with "?" representing a question left blank. The two arrays are not empty and are the same length. Return the score for this array of answers, giving +4 for each correct answer, -1 for each incorrect answer, and +0 for each blank answer.

scoreUp(["a", "a", "b", "b"], ["a", "c", "b", "c"]) → 6
scoreUp(["a", "a", "b", "b"], ["a", "a", "b", "c"]) → 11
scoreUp(["a", "a", "b", "b"], ["a", "a", "b", "b"]) → 16

...Save, Compile, Run (ctrl-enter)

public int scoreUp(String[] key, String[] answers) { }

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