function clever_lily(a, p, tp) {
    let age = Number(a)
    let machine_price = Number(p)
    let toy_price = Number(tp)
    let sec_bd = 10
    let toys = 0
    let saved = 0
    for (i = 1; i <= age; i++) {
        if (i % 2 !== 0) {
            toys += 1
        } else {
            saved += sec_bd - 1
            sec_bd += 10
        }
    }
    saved += toys * toy_price
    if (saved >= machine_price) {
        console.log(`Yes! ${(saved - machine_price).toFixed(2)}`)
    } else {
        console.log(`No! ${(machine_price - saved).toFixed(2)}`)
    }

}