function hello(input) {

    let n = +input[0];
    let word = input[1];


    let taxiDay = 0.7 + (0.79 * n);
    let taxiNight = 0.7 + (0.9 * n);

    let bus = 0.09 * n;

    let train = 0.06 * n;




    if (n <= 20 && word === "day") {
        console.log(taxiDay.toFixed(2));
    }
    else if (n <= 20 && word === "night") {
        console.log(taxiNight.toFixed(2));
    }

    else if (n > 20 && n < 100) {
        console.log(bus.toFixed(2));
    }
    else if (n >= 100 && n <= 5000) {
        console.log(train.toFixed(2));
    }




}
hello(["180", "night"]);