function lily(input) {
    let age = +(input.shift());
    let washingMashinePrice = +(input.shift());
    let toysPrice = +(input.shift());
    let money = 0;
    let countToys = 0;
    for (let i = 1; i <= age; i++) {
        if (i % 2 == 0) {
            money += (10 * i / 2) - 1;
        } else {
            countToys++;
        }
    }
    saves = money + countToys * toysPrice;
    if (saves >= washingMashinePrice) {
        console.log(`Yes! ${(saves - washingMashinePrice).toFixed(2)}`);
    } else {
        console.log(`No! ${(washingMashinePrice - saves).toFixed(2)}`);
    }
}