Tricks

ProblemSet

• binary tree inorder traversal
• unique binary search tree II
• unique binary search tree
• validate binary search tree
• recover binary search tree
• same tree
• symmetric tree
• binary tree level order traversal
• binary tree zigzag level order traversal
• maximum depth of binary tree
• construct binary tree from preorder and inorder traversal
• construct binary tree from inorder and postorder traversal
• binary tree level order traversal II
• convert sorted array to binary search tree
• balanced binary tree
• minimum depth of bianry tree
• path sum
• path sum II
• flatten bianry tree to linked list
• binary tree maximum path sum
• sum root to leaf numbers
• binary tree preorder traversal
• binary tree postorder traversal
• binary search tree iterator
• binary tree right side view
• count complete tree nodes
• invert binary tree
• kth smallest element in a BST
• lowest common ancestor of a BST
• lowest common ancestor of a BT
• binary tree paths
• serialize and deserialize binary tree
• house robber III
• sum of left leaves
• path sum III
• most frequent subtree sum
• find bottom left tree value
• find largest value in each tree row
• minimum absolute difference in BST
• convert BST to greater tree
• binary tree tilt
• subtree of another tree
• n-ary tree preorder traversal
• add one row to tree
• average of levels in BT
• two sum IV - input is a bst
• maximum width of a BT
• trim a BST
• redundant connection
• redundant connection II
• minimum distance between BST nodes
• sum of distances in tree
• all nodes distance K in BT
• leaf-similar trees
• increasing order search tree
• range sum of BST
• binary tree cameras
• flip binary tree to match preorder traversal
• distribute coins in BT
• vertical order traversal of a BT
• cousins in BT
• maximum difference between node and ancestor
• recover a tree from preorder traversal
• binary search tree to greater sum tree
• delete nodes and return forest
• lowest common ancestor of deepest leaves
• binary tree coloring game
• deepest leaves sum
• all elements in two BSTs
• throne inheritance