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Array

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 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.
LeetCode 3439: Reschedule Meetings for Maximum Free Time (Sliding Window)
·3 mins
LeetCode Daily Medium Sliding Window Two Pointers Intervals Array
Sliding window over meetings; track total duration in a k-sized window and compute free span between boundaries.
LeetCode 209: Minimum Size Subarray Sum (Sliding Window)
·1 min
LeetCode Daily Medium Array Sliding Window Two Pointers Prefix Sum Binary-Search
Sliding window with two pointers; minimize subarray length where sum ≥ target.
LeetCode 1695: Maximum Erasure Value (Sliding Window)
·1 min
LeetCode Daily Medium Sliding Window Two Pointers Array Hashset
Sliding window with a set and running sum; two pointers to keep the subarray unique.
LeetCode 1497: Check If Array Pairs Are Divisible by k (Remainder Pairing, Modulo)
·2 mins
LeetCode Daily Medium Array Hash Map Modulo Math Counting Complement
Remainder pairing with a hash map; handle 0 and k/2 remainders carefully.
LeetCode 1658: Minimum Operations to Reduce X to Zero
·3 mins
LeetCode Daily Medium Sliding Window Array Reverse Thinking Prefix Sum
LeetCode Problem Solving - Reverse Thinking with Sliding Window