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Extreme nodes in alternate order (Function Problem)
     

Given a binary tree, print nodes of extreme corners of each level but in alternate order.

Example:
extremeNodes

For above tree, the output is

1 2 7 8 31
– print rightmost node of 1st level
– print leftmost node of 2nd level
– print rightmost node of 3rd level
– print leftmost node of 4th level
– print rightmost node of 5th level

 

Input:
The task is to complete the method which takes one argument, root of the Tree. The struct node has a data part which stores the data, pointer to left child and pointer to right child.
There are multiple test cases. For each test case, this method will be called individually.


Output:
The function should print extreme nodes in alternte manner.

Constraints:
1 <=T<= 30
1 <=Number of nodes<= 100
1 <=Data of a node<= 1000

Example:
Input:

2
2
1 2 R 1 3 L
7
20 8 L 20 22 R 8 4 L 8 12 R 12 10 L 12 14 R 22 25 R

 

Output:
1 3
20 8 25 10

There are two test casess.  First case represents a tree with 3 nodes and 2 edges where root is 1, left child of 1 is 3 and right child of 1 is 2.   Second test case represents a tree with 7 edges and 8 nodes.

 

Note:The Input/Ouput format and Example given are used for system's internal purpose, and should be used by a user for Expected Output only. As it is a function problem, hence a user should not read any input from stdin/console. The task is to complete the function specified, and not to write the full code.

** For More Input/Output Examples Use 'Expected Output' option **

Contributor: Harshit Sidhwa


					   
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