bob

def countAcross(money: Int, coins: List[Int], index: Int): Int = {
        if(index < coins.length)
            countVertical(money - coins(index), coins, index) +
            countAcross(money, coins, index + 1)
        else
            0
    }

    def countVertical(money: Int, coins: List[Int], index: Int): Int = {
        if(money == 0)
            1
        else if(money < 0)
            0
        else
            countVertical(money - coins(index), coins, index) +
            countAcross(money, coins, index + 1)
     }
    if (coins.isEmpty)
        0
    else
        countVertical(money, coins, 0)