public static void bonAppetit(List<Integer> bill, int k, int b) {
    // Write your code here
        int total = 0;
        for(Integer e : bill)
        {
            total = total + e;
        }
        int anna = total - bill.get(k);
        anna = anna/2;
        
        if(b == anna)
            System.out.print("Bon Appetit");
        else 
            System.out.print(b-anna);
        

    }