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Leetcode 2503. Maximum Number of Points From Grid Queries
For each query threshold, compute how many distinct cells you can reach from the top-left by moving 4-directionally through cells whose value is strictly less than the query. With up to 10^6 cells and many queries, this is typically solved by answering thresholds offline (e.g., sort queries and progressively include/union cells by increasing value) to avoid repeated searches.
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