[CPP] 100. Same Tree

Author: UnresolvedCold

cpp/100-Same-Tree.cpp

@@ -0,0 +1,21 @@
+/**
+ * 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 and 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); 
+    }
+};