Given a Binary Tree and a target key, your task is to complete the function getLevel() that returns the level of the key from the given binary tree.
3 / \ 2 5 / \ 1 4 Key: 4 Level: 3
Note: if no such key exsits then return 0.
The function takes 2 arguments as input, first the reference pointer to the root node of the binary tree and a integer value target. There will be multiple test cases and for each test the function will be called seperately.
For each test return the level of the target value from the binary tree.
1 2 L 1 3 R
1 2 R 1 3 L 2 4 L 2 5 R 4 7 L
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.