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Cousins of Given Node in Binary Tree
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Cousins of Given Node in Binary Tree

Contributed by
Ashwani
Medium
yellow-spark
0/80
Avg time to solve 10 mins
Success Rate 90 %
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6 upvotes

Problem Statement

Given a binary tree of N nodes and a node of this tree, you need to return a list containing the values of the cousins of the given node in the given binary tree sorted by non-decreasing order of their values.

Note:
Two nodes of a binary tree are cousins if they have the same depth or level, but have different parents.

No two nodes in the given binary tree will have the same data values.
Example :

Example Of Cousins

Detailed explanation ( Input/output format, Notes, Constraints, Images )
Sample Input 1 :
2
1 2 3 4 -1 5 6 -1 7 -1 -1 -1 -1 -1 -1
4
1 2 3 -1 -1 -1 -1
2 
Sample Output 1 :
5 6
-1
Explanation For Sample Input 1 :
The tree representation for test case 2 is given below.

Sample Test case 2

Sample Input 2 :
2
1 2 3 4 5 6 -1 7 8 -1 -1 9 10 -1 -1 -1 -1 -1 -1 -1 -1
9   
1 2 -1 3 4 -1 -1 -1 -1
3
Sample Output 2 :
7 8 10
-1
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