[백준] 1333번 : 부재중 전화 - Javascript(자바스크립트)

https://www.acmicpc.net/problem/1333

const fs=require('fs')
ip=fs.readFileSync(0).toString().split(' ')
n=parseInt(ip[0])
l=parseInt(ip[1])+5
d=parseInt(ip[2])
num=0
time=d
for(i=0;i<n;i++){
    num+=l
    for(;;){
        if(time<num-5) time+=d
        else break
    }
    if(num-5<=time&&time<num) break
}
console.log(time)