추석 트래픽

https://programmers.co.kr/learn/courses/30/lessons/17676

코딩테스트 연습 - [1차] 추석 트래픽

 

function solution(lines) {
    const logs = lines.map((e) => e.slice(11).split(" ")).map((e) => [toTimeNumber(e[0]), Number(e[1].replace("s",""))]);
    const times = logs.map((e) => [e[0] - (e[1] * 1000) + 1, e[0]]).sort((a, b) => a[0] - b[0]);
    
    let answer = 0;
    let window = [];
    times.forEach(([start, end]) => {
        window.push(end);
        window = window.filter((e) => e > start - 1000);
        answer = Math.max(window.length, answer);
    });
    return answer;
}

const toTimeNumber = (time) => {
    const hour = (time[0]*10 + time[1]*1) * 60 * 60;
    const minute = (time[3]*10 + time[4]*1) * 60;
    const seconds = time[6]*10 + time[7]*1;
    const millis = time[9]*100 + time[10]*10 + time[11]*1;
    const amount = (hour + minute + seconds) * 1000 + millis;
  
    return amount;
}