package Question4_6;
import CtCILibrary.TreeNode;
public class Question {
public static TreeNode inorderSucc(TreeNode n) {
if (n == null) return null;
// Found right children -> return left most node of right subtree
if (n.parent == null || n.right != null) {
return leftMostChild(n.right);
} else {
TreeNode q = n;
TreeNode x = q.parent;
// Go up until we�re on left instead of right
while (x != null && x.left != q) {
q = x;
x = x.parent;
}
return x;
}
}
public static TreeNode leftMostChild(TreeNode n) {
if (n == null) {
return null;
}
while (n.left != null) {
n = n.left;
}
return n;
}
public static void main(String[] args) {
int[] array = {1, 2, 3, 4, 5, 6, 7, 8, 9, 10};
TreeNode root = TreeNode.createMinimalBST(array);
for (int i = 0; i < array.length; i++) {
TreeNode node = root.find(array[i]);
TreeNode next = inorderSucc(node);
if (next != null) {
System.out.println(node.data + "->" + next.data);
} else {
System.out.println(node.data + "->" + null);
}
}
}
}