プログラマーコードテスト「模擬試験」

function solution(answers) {
    let answer = [];
    let students = [[1, 2, 3, 4, 5], [2, 1, 2, 3, 2, 4, 2, 5], [3, 3, 1, 1, 2, 2, 4, 4, 5, 5]];
    let tmpArr = [];

    
    for (let i=0; i<students.length; i++) {
        let cnt=0;
        let n=0;
        
        for (let j=0; j<answers.length; j++) {
            if (students[i].length === n) n=0;
            if (answers[j] === students[i][n]) cnt++;
            n++;
        }
        
        if (tmpArr.length === 0) tmpArr.push([i+1, cnt]);
        else if (tmpArr[tmpArr.length-1][1] < cnt) {
            tmpArr=[];
            tmpArr.push([i+1, cnt]);
        } else if (tmpArr[tmpArr.length-1][1] === cnt) tmpArr.push([i+1, cnt]);
    }
    
    if (tmpArr.length === 1) answer.push(tmpArr[0][0]);
    else {
        for (let i=0; i<tmpArr.length; i++) {
            answer.push(tmpArr[i][0]);   
        }
    }
    
    answer.sort((a, b) => {return a - b} );
    
    return answer;
}

解法

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