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Grind 75Official

Updated version of Blind 75 by the same author (Yangshun Tay). A better, more balanced set of 75 problems across all key topics.

By FleetCode73 problems21 Easy43 Medium9 HardUpdated 23 Mar 2026

73problems

21Easy

43Medium

9Hard

Signed in, the sheet shows which of these you have solved.

Showing 9 of 73 problems · Hard · Clear

TitleSolutionAcceptDifficultyTopics

42. Trapping Rain WaterVideo

Solution68.2%Hard

Array, Dynamic Programming +3· 73 companies

76. Minimum Window SubstringVideo

Solution48.3%Hard

Hash Table, Sliding Window +1· 35 companies

224. Basic CalculatorVideo

Solution47.3%Hard

Math, Recursion +2· 25 companies

84. Largest Rectangle in HistogramVideo

Solution50.7%Hard

Array, Monotonic Stack +1· 30 companies

23. Merge k Sorted ListsVideo

Solution60.3%Hard

Divide and Conquer, Heap (Priority Queue) +2· 50 companies

297. Serialize and Deserialize Binary TreeVideo

Solution61.1%Hard

Binary Tree, Breadth-First Search +4· 23 companies

1235. Maximum Profit in Job SchedulingVideo

Solution54.8%Hard

Array, Binary Search +2· 22 companies

127. Word LadderVideo

Solution46.3%Hard

Breadth-First Search, Hash Table +1· 41 companies

295. Find Median from Data StreamVideo

Solution54.9%Hard

Data Stream, Design +3· 40 companies

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