static void Main(string[] args)
{
//Reverse in order traversal
//BST tree = new BST(15);
//tree.left = new BST(5);
//tree.left.right = new BST(5);
//tree.left.left = new BST(2);
//tree.left.left.right = new BST(3);
//tree.left.left.left = new BST(1);
//tree.right = new BST(20);
//tree.right.right = new BST(22);
//tree.right.left = new BST(17);
BST tree = new BST(20);
tree.left = new BST(15);
tree.right = new BST(25);
tree.left.left = new BST(10);
tree.left.right = new BST(19);
tree.right.left = new BST(21);
tree.right.right = new BST(30);
tree.right.left.right = new BST(22);
int k = 3;
FindKthLargestValueInBst(tree, k);
}