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solution.java
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solution.java
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import java.util.*;
import java.io.*;
class Node {
Node left;
Node right;
int data;
Node(int data) {
this.data = data;
left = null;
right = null;
}
}
class Solution {
//Method for PreOrder Traversal in Tree: ROOT-LEFT-RIGHT
public static void preOrder(Node root) {
//If current node is null return back
if(root == null)
return;
//Print the data of current node
System.out.print(root.data + " ");
//Pass on the left node of current node
preOrder(root.left);
//Pass on the right node of current node
preOrder(root.right);
}
public static Node insert(Node root, int data) {
if(root == null) {
return new Node(data);
} else {
Node cur;
if(data <= root.data) {
cur = insert(root.left, data);
root.left = cur;
} else {
cur = insert(root.right, data);
root.right = cur;
}
return root;
}
}
public static void main(String[] args) {
Scanner scan = new Scanner(System.in);
int t = scan.nextInt();
Node root = null;
while(t-- > 0) {
int data = scan.nextInt();
root = insert(root, data);
}
scan.close();
preOrder(root);
}
}