https://programmers.co.kr/learn/courses/30/lessons/12899/solution_groups?language=javascript

oneTwoFour.js

function solution(n) {
    var answer = '';
    
    while(n > 0){
        const remainder = n%3 || 3;
        answer = (remainder === 3 ? 4 : remainder) + answer;
        n = (n-remainder)/3;
    }
    
    return answer;
}