Hello All,

Below is one of the puzzles I was asked in one of interview Walmart and I could not understand the testcases. Can anyone please solve this.

"Henry is very interested in history and all the generations of his family. He does a lot research and realizes that he is descended from the great Mayan dynasty. After a lot of searching through ancient records and the latest records of the society, he is able to find out all the parent-child relationship in his family all the way from the great emperor Ming of the dynasty to himself

These relationships are given in the form a linear array where emperor is at the first position and his children are at pos (2i + 1) and (2i + 2)

This is the pattern followed throughout.

Henry wants to figure out all the siblings of the person X from the data.

Return the sorted list of all of john's siblings.

If no sibling return {-1}

input 1: N, the length of the array
input2: An array representing the ancentral tree
input 3 : X, the person whose siblings are sought.

output - return the array of all siblings in increasingly sorted order.

Examples :

input 1 : 5
input 2 : {1,2,3,4,5}
input 3 : 1

out put : {-1}

Explanation : x is the root of the tree and has no siblings

input 1 : 6
input 2 : {1,2,3,4,5,6}
input 3 : 5

output : {4,6}

Explanation : {2,3 } are the children of {1}.
{4,5,6 } are the children of {2,3}, thus the siblings of x= 5 are {4,6}