Geeksforgeeks

Error

There is BST given with root node with key part as integer only. You need to find the inorder successor and predecessor of a given key. In case, if the either of predecessor or successor is not found print -1.

**Input:**

The first line of input contains an integer T denoting the number of test cases. Then T test cases follow. Each test case contains n denoting the number of edges of the BST. The next line contains the edges of the BST. The last line contains the key.

**Output:**

Print the predecessor followed by successor for the given key. If the predecessor or successor is not found print -1.

**Constraints:**

1<=T<=100

1<=n<=100

1<=data of node<=100

1<=key<=100

**Example:
Input:**

2

6

50 30 L 30 20 L 30 40 R 50 70 R 70 60 L 70 80 R

65

6

50 30 L 30 20 L 30 40 R 50 70 R 70 60 L 70 80 R

100

**Output:**

60 70

80 -1

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Predecessor and Successor

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