[CPP] 226. Invert Binary Tree

javiermon · Apr 3, 2022 · cd9f44d · cd9f44d
1 parent 188d21c
commit cd9f44d
Showing 1 changed file with 26 additions and 0 deletions.
diff --git a/cpp/226-Invert-Binary-Tree.cpp b/cpp/226-Invert-Binary-Tree.cpp
@@ -0,0 +1,26 @@
+/**
+ * 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:
+ TreeNode* invertTree(TreeNode* root) {
+ if (root == NULL) return root;
+ auto ptr = root;
+ auto temp = ptr->left;
+ ptr->left = ptr->right;
+ ptr->right = temp;
+
+ invertTree(ptr->left);
+ invertTree(ptr->right);
+
+ return root;
+ }
+};