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import java.lang.*;
import java.util.*;
import node.*;
class Subtree {
public static boolean isSubtree(TreeNode root, TreeNode subRoot) {
if (root == null && subRoot == null)
return true;
else if (root == null || subRoot == null)
return false;
else if (root.val == subRoot.val)
return isSubtree(root.left, subRoot.left)
&& isSubtree(root.right, subRoot.right);
return isSubtree(root.left, subRoot) || isSubtree(root.right, subRoot);
}
public static void main(String[] args) {
TreeNode leftLeaf = new TreeNode(1);
TreeNode middleLeaf = new TreeNode(2);
TreeNode leftParent = new TreeNode(4, leftLeaf, middleLeaf);
TreeNode rightLeaf = new TreeNode(5);
TreeNode root = new TreeNode(3, leftParent, rightLeaf);
TreeNode subLeft = new TreeNode(1);
TreeNode subRight = new TreeNode(2);
TreeNode subRoot = new TreeNode(4, subLeft, subRight);
System.out.println(isSubtree(root, subRoot));
}
}
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