diff --git a/C++/100_Sametree.cpp b/C++/100_Sametree.cpp
new file mode 100644
index 0000000..127b6a6
--- /dev/null
+++ b/C++/100_Sametree.cpp
@@ -0,0 +1,23 @@
+/**
+ * Definition for a binary tree node.
+ * struct TreeNode {
+ *     int val;
+ *     TreeNode *left;
+ *     TreeNode *right;
+ *     TreeNode() : val(0), left(nullptr), right(nullptr) {}
+ *     TreeNode(int x) : val(x), left(nullptr), right(nullptr) {}
+ *     TreeNode(int x, TreeNode *left, TreeNode *right) : val(x), left(left), right(right) {}
+ * };
+ */
+class Solution {
+public:
+    bool isSameTree(TreeNode* p, TreeNode* q) {
+        if(p==NULL && q==NULL)
+            return true;
+        if(p==NULL || q==NULL)
+            return false;
+        if(p->val!=q->val)
+            return false;
+        return isSameTree(p->left,q->left) && isSameTree(p->right,q->right);
+    }
+};