Whole submatrix

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After Chef successfully built a modern (L, K)-window on the attic wall he decided to expand the notion of the (L, K)-window in some other areas. Now he considers a rectangular grid that contains only zeroes and ones and has size N x M. He considers the (L, K)-window here as any submatrix of size L x K that contains only ones. Formally he defines (L, K)-window as any (K+L)-tuple (R1, ..., RL, C1, .

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solution.cppC++17

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