Tree

Depth First Search of Tree

Leetcode 144. Binary Tree Preorder Traversal

Leetcode 94. Binary Tree Inorder Traversal

Leetcode 145. Binary Tree Postorder Traversal

Breadth First Search of Tree

Leetcode 102. Binary Tree Level Order Traversal

Structure of Tree

Leetcode 156. Binary Tree Upside Down

Depth of Tree

Leetcode 104. Maximum Depth of Binary Tree

Leetcode 110. Balanced Binary Tree

Leetcode 111. Minimum Depth of Binary Tree