124나라의 숫자

function solution(n) {
    let answer = '';
    while(n>0){
        if(n%3==0){
            answer='4'+answer;
            n=n/3-1;
        }else if(n%3==1){
            answer='1'+answer;
            n=Math.floor(n/3);
        }else{
            answer='2'+answer;
            n=Math.floor(n/3);
        }
    }
    
    
    return answer;
}