function solve() {

    let textAreaElements = document.getElementsByTagName("textarea");
    let buttonsElement = document.getElementsByTagName("button");
    let tbody = document.getElementsByTagName("tbody")[0];
    document.getElementsByTagName("input")[0].disabled = false;
    buttonsElement[0].addEventListener("click", generate);
    buttonsElement[1].addEventListener("click", buy);

    function generate() {

        let furnitureListInput = JSON.parse(textAreaElements[0].value);
        for (let i = 0; i < furnitureListInput.length; i++) {
            tbody.appendChild(document.getElementsByTagName("tr")[1].cloneNode(true));
            addFurniture(furnitureListInput[i]);
        }
    }

    function addFurniture(furniture) {
        let allFurnitureElements = document.getElementsByTagName("tr");
        let currentFurnitureElements = allFurnitureElements[allFurnitureElements.length - 1];
        currentFurnitureElements.getElementsByTagName("img")[0].src = furniture["img"];
        currentFurnitureElements.getElementsByTagName("p")[0].textContent = furniture["name"];
        currentFurnitureElements.getElementsByTagName("p")[1].textContent = furniture["price"];
        currentFurnitureElements.getElementsByTagName("p")[2].textContent = furniture["decFactor"];
    }

    function buy() {
        let furniture = [];
        let totalPrice = 0;
        let averageFactor = 0;
        let checkbox = Array.from(document.getElementsByTagName("input"));
        for (let i = 0; i < checkbox.length; i++) {
            if (checkbox[i].checked) {
                let tableElements = checkbox[i].parentElement.parentElement;
                let name = tableElements.getElementsByTagName("p")[0].textContent;
                furniture.push(name);
                let price = tableElements.getElementsByTagName("p")[1].textContent;
                totalPrice += +price;
                let decFactor = tableElements.getElementsByTagName("p")[2].textContent;
                averageFactor += +decFactor;
            }
        }
        document.getElementsByTagName("textarea")[1].textContent += `Bought furniture: ${furniture.join(", ")}\n`;
        document.getElementsByTagName("textarea")[1].textContent += `Total price: ${totalPrice.toFixed(2)}\n`;
        document.getElementsByTagName("textarea")[1].textContent += `Average decoration factor: ${averageFactor/furniture.length}`;
    }
}