1292. Maximum Side Length of a Square | Prefix Sum + Binary Search | LeetCode Daily 19 Jan 2026
Автор: Visually Inclined
Загружено: 2026-01-18
Просмотров: 25
Описание:
LeetCode Daily Problem (19th Jan 2026)
Educational Insight -
The "1292. Maximum Side Length of a Square with Sum Less than or Equal to Threshold" problem demonstrates the power of Prefix Sum combined with Binary Search.
By precomputing a 2D prefix sum matrix, we can evaluate any square submatrix sum in O(1) time. Binary search on the side length helps efficiently determine the largest valid square under the given threshold.
Key Implementation Details
• Build a 2D prefix sum matrix for fast sum queries
• Apply binary search on the possible side lengths
• Validate each candidate square in constant time
• Reduce overall complexity compared to brute force
Full platform dropping soon. Stay tuned.
Join the waitlist: https://www.visuallyinclined.in/waitlist
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