BETA

Difficulty Level:

Easy

Total Submissions: 13115 Accuracy:

30.61%

Left View of Binary Tree (Function Problem)

Given a Binary Tree, print Left view of it. Left view of a Binary Tree is set of nodes visible when tree is visited from Left side.

Left view of following tree is 1 2 4 8

          1
       /     \
     2        3
   /     \    /    \
  4     5   6    7
   \
     8

            

Input:
The task is to complete the method which takes one argument, root of Binary Tree.
There are multiple test cases. For each test case, this method will be called individually.

Output:
The function should print nodes in left view of Binary Tree.

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

Example:
Input:

2
2
1 2 R 1 3 L
4
10 20 L 10 30 R 20 40 L 20 60 R

Output:
1 3
10 20 40

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 4 edges and 5 nodes.

 

Note:The Input/Ouput format and Example given above 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: Amit Khandelwal, Harshit Sidhwa


					   
It is recommended to 'Compile & Test' your code before clicking 'Submit'!

Compilation/Execution Result:

Need help with your code? Please use ide.geeksforgeeks.org, generate link and share the link here.