public static void bonAppetit(List<Integer> bill, int k, int b) {
        int share = 0;
        for(int i = 0; i < bill.size(); i++){
            if(i != k){
                share += bill.get(i);
            }
        }
        if((share / 2) == b){
            System.out.println("Bon Appetit");
        }
        else{
            System.out.println(b - share / 2);
        }
    }