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class TreeTest{

private Node root;

insert(int input)

{

Node newNode = new Node(input);

if (root == null)

{

root = newNode;

}

else{

Node curPtr = root;

Node fathPtr;

while(curPtr != null)

{

fathPtr = curPtr;

if(curPtr.key>input)

{

curPtr = curPtr.leftChild;

if(curPtr == null)

{

fathPtr.leftChild = newNode;

}

}

else

{

curPtr = curPtr.rightChild;

if(curPtr == null)

{

fathPtr.rightChild = newNode;

}

}

}

}

}

}

class Node

{

public Node leftChild;

public Node rightChild;

public int key;

Node(int keys)

{

key = keys;

}

}