Subtree of Another solution

Author: PDKhan

subtree-of-another-tree/PDKhan.cpp

@@ -0,0 +1,21 @@
+class Solution {
+public:
+    bool compare_tree(TreeNode* root, TreeNode* subRoot) {
+        if(!root && !subRoot)
+            return true;
+        else if(!root || !subRoot || root->val != subRoot->val)
+            return false;
+        
+        return compare_tree(root->left, subRoot->left) && compare_tree(root->right, subRoot->right);
+    }
+
+    bool isSubtree(TreeNode* root, TreeNode* subRoot) {
+        if(!root)
+            return false;
+        
+        if(compare_tree(root, subRoot))
+            return true;
+
+        return isSubtree(root->left, subRoot) || isSubtree(root->right, subRoot);
+    }
+};