[LeetCode] 1284. Minimum Number of Flips to Convert Binary Matrix to Zero Matrix ת»¯ÎªÈ«Áã¾ØÕóµÄ×îÉÙ·´×ª´ÎÊý

Given a m x n binary matrix mat. In one step, you can choose one cell and flip it and all the four neighbors of it if they exist (Flip is changing 1 t