ski trip

        function skiTrip(input) {
            let nights = Number(input[0]);
            let typeRoom = input[1];
            let grade = input[2];
            let totalPrice = 0;
            let price = 0;

            if (typeRoom === "roomForOnePerson") {
                price = 18 * nights;
            } else if (typeRoom === "apartment" && nights < 10) {
                price = 25 * 0.7 * nights;
            } else if (typeRoom === "presidentApartment" && nights < 10) {
                price = 35 * 0.9 * nights;
            } else if (typeRoom === "apartment" && 10 <= nights && nights < 15) {
                price = 25 * 0.65 * nights;
            } else if (typeRoom === "presidentApartment" && 10 <= nights && nights < 15) {
                price = 35 * 0.85 * nights;
            } else if (typeRoom === "apartment" && nights > 15) {
                price = 25 * 0.5 * nights;
            } else if (typeRoom === "presidentApartment" && nights > 15) {
                price = 35 * 0.8 * nights;
            }

            if (grade === "positive") {
                totalPrice = price * 0.75;
            } else if (grade === "negative") {
                totalPrice = price * 0.9;

            }
            console.log(totalPrice.toFixed(2));
        }
    }

    skiTrip(["14", "apartment", "positive"]);