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Coding
Theory
Backspace String Compare
Junior
Final Prices With a Special Discount in a Shop
Junior
Maximum Nesting Depth of the Parentheses
Junior
Next Greater Element I
Junior
Remove All Adjacent Duplicates In String
Junior
Valid Parentheses
Junior
Analyzing Call Paths
Mid
Asteroid Collision
Mid
Basic Calculator
Mid
Basic Calculator II - Evaluate Arithmetic Expression
Mid
Buildings With an Ocean View
Mid
Car Fleet
Mid
Complex String Parser
Mid
Counting Redundant Directional Commands
Mid
Crawler Log Folder
Mid
Daily Temperatures
Mid
Decode String
Mid
Evaluate Reverse Polish Notation
Mid
Exclusive Time of Functions
Mid
Figma Layers Panel with Undo/Redo
Mid
Infix to Postfix Conversion
Mid
Interval List Intersections
Mid
Largest Square in Histogram
Mid
Lexicographically Smallest String After Removing Stars
Mid
Maximum Width Ramp
Mid
Message Command Parser
Mid
Minimum Number of Swaps to Make the String Balanced
Mid
Minimum Remove to Make Valid Parentheses
Mid
Modified Stock Span Problem
Mid
Molecular Weight of Chemical Formula
Mid
Nearest Smaller Element
Mid
Nested HTML Hidden Message
Mid
Online Stock Span
Mid
Postfix Evaluation
Mid
Remove All Adjacent Duplicates in String II
Mid
Remove Duplicate Letters
Mid
Reverse Substrings Between Each Pair of Parentheses
Mid
Score of Parentheses
Mid
Simplify Unix-Style File System Path
Mid
Stack Trace to Execution Trace
Mid
Tag Validator
Mid
Using a Robot to Print the Lexicographically Smallest String
Mid
Validate Orders Path
Mid
Basic Calculator III
Senior
Design a Min Stack
Senior
Design LFU Cache
Senior
Largest Rectangle in Histogram
Senior
Longest Valid Parentheses
Senior
Number of Atoms
Senior
Postfix to Infix with Bracket Reduction
Senior
Remove Invalid Parentheses
Senior
Top 77 Stacks Interview Questions And Answers 2025 | TechPrep