模擬試験

プログラマー42840題

説明する

function solution(answers) {
  let first = [1,2,3,4,5];
let second = [2,1,2,3,2,4,2,5];
let third = [3,3,1,1,2,2,4,4,5,5]
  let winner =[];
  let rank =[];
  let answer1 = first.join("").repeat(Math.ceil(answers.length/first.length)).slice(0,answers.length).split("")
  let answer2 = second.join("").repeat(Math.ceil(answers.length/first.length)).slice(0,answers.length).split("")
let answer3 = third.join("").repeat(Math.ceil(answers.length/first.length)).slice(0,answers.length).split("")

  let rank1 = answer1.filter((cur, i) => {
    return cur == answers[i]
  });
  let rank2 = answer2.filter((cur, i) => {
    return cur == answers[i]
  });
  let rank3 = answer3.filter((cur, i) => {
    return cur == answers[i]
  });
  rank.push(rank1.length, rank2.length, rank3.length)
  let idx = rank.indexOf(Math.max(...rank))

  if (rank[0] != rank[1] && rank[1] != rank[2] && rank[0] != rank[2]) {
    winner.push(idx+1)
  } else {
    while (idx != -1) {
      winner.push(idx + 1)
      idx = rank.indexOf(Math.max(...rank), idx+1)
    }
  };
  return winner
}

他人の解答

function solution(answers) {
  var answer = [];
  const man1 = [1, 2, 3, 4, 5];
  const man2 = [2, 1, 2, 3, 2, 4, 2, 5];
  const man3 = [3, 3, 1, 1, 2, 2, 4, 4, 5, 5];
  let count = [0, 0, 0];

  for (let i = 0; i < answers.length; i++) {
    if (answers[i] == man1[i % man1.length]) count[0]++;
    if (answers[i] == man2[i % man2.length]) count[1]++;
    if (answers[i] == man3[i % man3.length]) count[2]++;
  }

  const max = Math.max(count[0], count[1], count[2]);
  for (let i = 0; i < count.length; i++) {
    if (max == count[i]) answer.push(i + 1);
  }

  return answer;
}

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