Lca Of Bst

easy

1. You are given a partially written BST class.
2. You are required to complete the body of lca function. "lca" function is expected to find the lowest commong ancestor of d1 and d2.
3. Input and Output is managed for you. 

Note -&gt; Please watch the question video for clarity.

Input Format

Input is managed for you

Output Format

Output is managed for you

Constraints

None

Notice

Try First, Check Solution later

1. You should first read the question and watch the question video.
2. Think of a solution approach, then try and submit the question on editor tab.
3. We strongly advise you to watch the solution video for prescribed approach.

Example

Input

21
50 25 12 n n 37 30 n n n 75 62 60 n n 70 n n 87 n n
12
30

Output

Replace With Sum Of Larger

Print In Range