add: 220112

2201/220112.cpp

@@ -0,0 +1,38 @@
+#include <iostream>
+
+/**
+ * Definition for a binary tree node.
+ */
+struct TreeNode {
+    int val;
+    TreeNode *left;
+    TreeNode *right;
+    TreeNode() : val(0), left(nullptr), right(nullptr) {}
+    explicit TreeNode(int x) : val(x), left(nullptr), right(nullptr) {}
+    TreeNode(int x, TreeNode *left, TreeNode *right) : val(x), left(left), right(right) {}
+	~TreeNode() { delete this->left; delete this->right; }
+};
+
+class Solution {
+public:
+	static TreeNode* insertIntoBST(TreeNode* root, int val) {
+		if (!root)
+			return new TreeNode(val);
+		if (val > root->val) {
+			if (root->right) {
+				insertIntoBST(root->right, val);
+			} else {
+				root->right = new TreeNode(val);
+			}
+		} else if (val < root->val) {
+			if (root->left) {
+				insertIntoBST(root->left, val);
+			} else {
+				root->left = new TreeNode(val);
+			}
+		} else {
+			return nullptr;
+		}
+		return root;
+	}
+};

2201/CMakeLists.txt

@@ -3,4 +3,4 @@ PROJECT(2201)
 
 SET(CMAKE_CXX_STANDARD 23)
 
-ADD_EXECUTABLE(2201 220112-CN.cpp)
+ADD_EXECUTABLE(2201 220112.cpp)