04. workout

function workout(input) {

    let n = Number(input[0]);
    let firstDay = Number(input[1]);

    let sumKm = firstDay;
    let index = 2;

    for (let i = 1; i <= n; i++) {

        let nextDay = Number(input[index]);
        firstDay = firstDay + firstDay * (nextDay / 100);

        sumKm += firstDay;
    }

    if (sumKm >= 1000) {
        console.log(`You've done a great job running ${Math.ceil(sumKm - 1000)} more kilometers!`);
    } else {
        console.log(`Sorry Mrs. Ivanova, you need to run ${Math.ceil(1000 - sumKm)} more kilometers`);
    }

}
workout(["5",
    "30",
    "10",
    "15",
    "20",
    "5",
    "12"]);