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Ceil in BST
Medium Accuracy: 55.95% Submissions: 11249 Points: 4

Given a BST and a number X, find Ceil of X.
Note: Ceil(X) is a number that is either equal to X or is immediately greater than X.

Example 1:

Input:
      5
    /   \
   1     7
    \
     2 
      \
       3
X = 3
Output: 3
Explanation: We find 3 in BST, so ceil
of 3 is 3.

Example 2:

Input:
     10
    /  \
   5    11
  / \ 
 4   7
      \
       8
X = 6
Output: 7
Explanation: We find 7 in BST, so ceil
of 6 is 7.

Your task:
You don't need to read input or print anything. Just complete the function findCeil() to implement ceil in BST which returns the ceil of in the given BST.

Expected Time Complexity: O(Height of the BST)
Expected Auxiliary Space: O(Height of the BST).

Constraints:
1 <= Number of nodes <= 105
1 <= Value of nodes<= 105

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Ceil in BST

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