s0701

src/s0701_insert_into_a_binary_search_tree.cpp

@@ -0,0 +1,26 @@
+#include "s0701_insert_into_a_binary_search_tree.hpp"
+
+TreeNode* S0701::insertIntoBST(TreeNode* root, int val) {
+  TreeNode *cur = root;
+  if (root == nullptr) {
+    return new TreeNode(val);
+  }
+  while (true) {
+    if (val < cur->val) {
+      if (cur->left == nullptr) {
+        cur->left = new TreeNode(val);
+        break;
+      } else {
+        cur = cur->left;
+      }
+    } else {
+      if (cur->right == nullptr) {
+        cur->right = new TreeNode(val);
+        break;
+      } else {
+        cur = cur->right;
+      }
+    }
+  }
+  return root;
+}