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Easy

LeetCode 121: Best Time To Buy And Sell Stock
·2 mins
LeetCode Easy Dynamic-Programming State-Machine
LeetCode note for Best Time To Buy And Sell Stock, rebuilt from the original learning note
LeetCode 746: Min Cost Climbing Stairs
·2 mins
LeetCode Easy Dynamic-Programming
LeetCode note for Min Cost Climbing Stairs, rebuilt from the original learning note
LeetCode 70: Climbing Stairs
·2 mins
LeetCode Easy Dynamic-Programming
LeetCode note for Climbing Stairs, rebuilt from the original learning note
LeetCode 1971: Find if Path Exists in Graph
·2 mins
LeetCode Easy Graph Union-Find
LeetCode note for Find if Path Exists in Graph, rebuilt from the original learning note
LeetCode 20: Valid Parentheses
·2 mins
LeetCode Daily Easy String Stack Data-Structures Parentheses Validation
Solving the Valid Parentheses problem using stack-based approach
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 1071: Greatest Common Divisor of Strings
·2 mins
LeetCode Daily Easy String Gcd Math
LeetCode Problem Solving
LeetCode 643: Maximum Average Subarray I
·1 min
LeetCode Daily Easy Sliding-Window
LeetCode Problem Solving
LeetCode 1550: Three Consecutive Odds
·1 min
LeetCode Easy Array
LeetCode Problem Solving
LeetCode 1399: Count Largest Group
·1 min
LeetCode Daily Easy Hash-Map
LeetCode Problem Solving
LeetCode 2325: Decode the Message
·1 min
LeetCode Daily Easy Hash-Map
LeetCode Problem Solving
LeetCode 724: Find Pivot Index
·2 mins
LeetCode Daily Easy Prefix-Sum
LeetCode Problem Solving