Write Code to Determine if Two Trees are Identical

Two trees are identical when they have same data and arrangement of data is also same.

To identify if two trees are identical, we need to traverse both trees simultaneously, and while traversing we need to compare data and children of the trees.


Code:

package trees;

class Node{

    int data;
    Node left, right;

    Node(int data){
        this.data = data;
        right = left = null;
    }

}

public class N1802_IdenticalTrees {

    Node tree1 = null, tree2 = null;


    boolean isIdentical(Node root1, Node root2){

        if(root1 == null && root2 == null){

            return true;
        }

        if(root1!= null && root2!= null){

            return (root1.data == root2.data)&& isIdentical(root1.left, root2.left) && isIdentical(root1.right,root2.right);
        }

        return false;

    }

    public static void main(String[] args){

        N1802_IdenticalTrees trees = new N1802_IdenticalTrees();

        trees.tree1 = new Node(2);
        trees.tree1.left = new Node(3);

        trees.tree2 = new Node(2);
        trees.tree2.left = new Node(3);
        trees.tree2.right = new Node(4);

        System.out.println(trees.isIdentical(trees.tree1, trees.tree2));


    }


}



Output

false

Reference:

https://www.geeksforgeeks.org/write-c-code-to-determine-if-two-trees-are-identical/

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