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Dutch national flag problem in Javascript

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Dutch national flag problem and solution in Javascript Problem statement:   The Dutch national flag (DNF) problem is one of the most popular programming problems proposed by Edsger Dijkstra. The flag of the Netherlands consists of three colors: white, red, and blue. The task is to randomly arrange balls of white, red, and blue such that balls of the same color are placed together. Now, let's consider an array with 3 distinct values say 0, 1 and 2. We won't be using any sort method and we need to sort this array in 0(n). Input Array :  let   arr  = [ 0 ,  2 ,  1 ,  0 ,  1 ,  2 ,  0 ,  2 ]; Expected Output: [ 0, 0, 0, 1, 1, 2, 2, 2 ] Solution Approach : When we see expected output, we can clearly see that sorted array is divided into 3 sections having values 0 , 1 and 2. So, let's divide the array in 3 sections: a) from 0th index to left boundary b) from left boundary to right boundary c) from right boundary to last index. Now we will create 2 pointers : left (starting from 0
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Bon Appétit: Hackerrank problem and solution

Bon Appétit: Hackerrank problem and solution in java Problem: Anna and Brian order   items at a restaurant, but Anna declines to eat any of the   item (where  ) due to an allergy. When the check comes, they decide to split the cost of all the items they shared; however, Brian may have forgotten that they didn't split the   item and accidentally charged Anna for it. You are given  ,  , the cost of each of the   items, and the total amount of money that Brian charged Anna for her portion of the bill. If the bill is fairly split, print  Bon Appetit ; otherwise, print the amount of money that Brian must refund to Anna. Input Format The first line contains two space-separated integers denoting the respective values of   (the number of items ordered) and   (the  -based index of the item that Anna did not eat).  The second line contains   space-separated integers where each integer   denotes the cost,  , of item   (where  ).  The third line contains an integer,  , de
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