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Given a binary matrix and a set of allowed operations or placement constraints (e.g., flipping rows/columns, selecting submatrices, or placing up to k ones), choose actions to maximize the total number of 1s. The core challenge is a combinatorial optimization over exponential choices that typically calls for bitmask DP, meet‑in‑the‑middle, greedy selection, or flow/graph modeling to prune the search.
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Leetcode 1183. Maximum Number of Ones
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