Description Submission Level Order Traversal vector<pair<Node*, int>> has no iterator, so we can only use index representation
Tree Traversal Summary
Preorder/Inorder/Postorder The order of the left subtree and the right subtree is constant, and there are 3 positions for the root to occupy. The order […]
Inserting a Node Into a Sorted Doubly Linked List
Description Submission The head and tail conditions should be considered