concert

function concert(input) {

    let time = {};
    let list = {};
    let totalTime = 0;

    for (let line of input) {
        if (line === "start of concert") {
            break;
        }
        let [command, band, timeOrMembers] = line.split("; ");

        if (command === "Add") {
            timeOrMembers = timeOrMembers.split(", ");
            if (!list.hasOwnProperty(band)) {
                list[band] = new Set();
            }
            timeOrMembers.forEach((member) => list[band].add(member))
        } else if (command === "Play") {
            timeOrMembers = Number(timeOrMembers);
            totalTime += timeOrMembers;
            if (!time.hasOwnProperty(band)) {
                time[band] = 0;
            }
            time[band] += timeOrMembers;
        }
    }

    console.log(`Total time: ${totalTime}`);
    let entries = Object.entries(time);
    entries.sort((a, b) => b[1] - a[1] || a[0].localeCompare(b[0])).forEach((tuple) => console.log(`${tuple[0]} -> ${tuple[1]}`))

    let bandToPrint = input.pop();
    console.log(bandToPrint)
    list[bandToPrint].forEach(member => console.log(`=> ${member}`))
}