Random exercise

function solve(overnights, type, rating) {
    overnights = Number(overnights) - 1;

    const accomodationTypes = {
        'room for one person': {
            price: 18,
            discount: [0,0,0]
        },
        'apartment': {
            price: 25,
            discount: [0.3, 0.35, 0.5]
        },
        'president apartment': {
            price: 35,
            discount: [0.1, 0.15, 0.2]
        }
    };

    let finalPrice;

    if (overnights < 10) {
        finalPrice = accomodationTypes[type].price * overnights;
        finalPrice -= finalPrice * accomodationTypes[type].discount[0];
    } else if (overnights >= 10 && overnights <= 15) {
        finalPrice = accomodationTypes[type].price * overnights;
        finalPrice -= finalPrice * accomodationTypes[type].discount[1];
    } else if (overnights > 15) {
        finalPrice = accomodationTypes[type].price * overnights;
        finalPrice -= finalPrice * accomodationTypes[type].discount[2];
    }

    if(rating == 'positive') {
        finalPrice *= 1.25;
    } else if (rating == 'negative') {
        finalPrice *= 0.9;
    }

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