[프로그래머스 Lv.1] 모의고사

function solution(answers) {
  let score1 = 0;
  let score2 = 0;
  let score3 = 0;

  const arr1 = [1, 2, 3, 4, 5];
  const arr2 = [2, 1, 2, 3, 2, 4, 2, 5];
  const arr3 = [3, 3, 1, 1, 2, 2, 4, 4, 5, 5];

  const result = [];

  answers.forEach((num, i) => {
    if (num === arr1[i % 5]) ++score1;
    if (num === arr2[i % 8]) ++score2;
    if (num === arr3[i % 10]) ++score3;
  });

  const maxNum = Math.max(score1, score2, score3);

  if (score1 === maxNum) result.push(1);
  if (score2 === maxNum) result.push(2);
  if (score3 === maxNum) result.push(3);

  return result;
}