Check the exam

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Approach

input will gonna array1, and array2

1. reducing array1 for accumulate of compare result with array2

   1. while iterate if array2[index] is same with array1[index] accumulate + 4, if not -1, butt if array2[index] is empty just do nothing

2. Returns the greater of 0 or process-1

Solution

JavaScript

const checkExam = (array1, array2) => Math.max(
  array1.reduce((acc, cur, i) => {
    if (cur === array2[i]) {
      return acc + 4;
    }
    if (!array2[i]) {
      return acc;
    }
    return acc - 1;
  }, 0),
  0,
);