Clear Digits

Check if a Parentheses String Can Be Valid

January 12, 2025 · 8 min ·  Tags List of tags for the post   greedy ·  leetcode ·  stack ·  string ·  Last updated: Aug 2, 2025

Final Prices With a Special Discount in a Shop

Construct Binary Search Tree BST from Preorder Traversal

Implement queue using linked list

December 2, 2024 · 3 min ·  Tags List of tags for the post   stack ·  queue ·  linkedlist ·  Last updated: Aug 2, 2025

Maximum Binary Tree

Min Queue

December 2, 2024 · 6 min ·  Tags List of tags for the post   stack ·  queue ·  max-min ·  Last updated: Aug 2, 2025

Verify Preorder Serialization of a Binary Tree

Beautiful Towers II

Binary Search Tree Iterator II

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