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Maximal Archipelago (271)

Instruction:
Turn some land squares into sea such that, a) all sea squares are connected to each other through other sea squares orthogonally, b) no two land squares are adjacent orthogonally and c) it is impossible to turn a sea square to land while still satisfying the above two conditions. A number outside the grid indicates the number of land squares remaining in the corresponding row/column.

Reference: WPC 2017 (11)