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Daily

LeetCode 901: Online Stock Span
·2 mins
LeetCode Daily Medium Stack Monotonic-Stack Design Data-Structure Algorithm
Solving the Online Stock Span problem using monotonic stack approach
LeetCode 853: Car Fleet
·2 mins
LeetCode Daily Medium Stack Sorting Simulation Greedy Array
Solving the Car Fleet problem using stack-based approach
LeetCode 84: Largest Rectangle in Histogram
·3 mins
LeetCode Daily Hard Stack Monotonic-Stack Array Histogram Geometry Algorithm Dynamic-Programming
Solving the Largest Rectangle in Histogram problem using monotonic stack approach
LeetCode 739: Daily Temperatures
·2 mins
LeetCode Daily Medium Stack Monotonic-Stack Array Temperature Waiting-Time Algorithm Data-Structure
Solving the Daily Temperatures problem using monotonic stack approach
LeetCode 22: Generate Parentheses
·2 mins
LeetCode Daily Medium Backtracking Recursion String Parentheses Combinatorics
Generating all valid parentheses combinations using backtracking approach
LeetCode 20: Valid Parentheses
·2 mins
LeetCode Daily Easy Stack String Parentheses Validation Algorithm Data-Structure
Solving the Valid Parentheses problem using stack-based approach
LeetCode 155: Min Stack
·2 mins
LeetCode Daily Medium Stack Design Data-Structure Tuple Constant-Time
Implementing a stack with O(1) minimum retrieval using tuple-based approach
LeetCode 150: Evaluate Reverse Polish Notation
·2 mins
LeetCode Daily Medium Stack Expression-Evaluation Reverse-Polish-Notation Postfix-Notation Mathematics Algorithm Data-Structure
Solving the Reverse Polish Notation evaluation problem using stack-based approach
LeetCode 503: Next Greater Element II (Monotonic Stack)
·2 mins
LeetCode Daily Medium Monotonic-Stack Stack Array Circular-Array
Monotonic stack on a circular array
LeetCode 496: Next Greater Element I (Monotonic Stack)
·2 mins
LeetCode Daily Easy Array Stack Monotonic-Stack Hash Map Next Greater Element
Monotonic decreasing stack over nums2 to build next-greater map; answer queries for nums1.