Java 8

public static void bonAppetit(List bill, int k, int b) { // Write your code here

    int totalCost = bill.stream().mapToInt(Integer::intValue).sum();
    int splitCharge = (totalCost - bill.get(k)) / 2;
    if(b - splitCharge > 0){
        System.out.println(b - splitCharge);
    } else{
        System.out.println("Bon Appetit");
    }

}