https://programmers.co.kr/learn/courses/30/lessons/42586?language=javascript
function solution(progresses, speeds) {
let answer = [0];
let days = progresses.map((progress, index) => Math.ceil((100 - progress) / speeds[index]));
let maxDay = days[0];
for(let i = 0, j = 0; i< days.length; i++){
if(days[i] <= maxDay) {
answer[j] += 1;
} else {
maxDay = days[i];
answer[++j] = 1;
}
}
return answer;
}