mirror of
https://gitee.com/coder-xiaomo/leetcode-problemset
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74 lines
10 KiB
JSON
74 lines
10 KiB
JSON
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"questionId": "2268",
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"title": "Remove All Ones With Row and Column Flips",
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"difficulty": "Medium",
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"exampleTestcases": "[[0,1,0],[1,0,1],[0,1,0]]\n[[1,1,0],[0,0,0],[0,0,0]]\n[[0]]",
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"categoryTitle": "Algorithms",
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"hints": [
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"Does the order, in which you do the operations, matter?",
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"No, it does not. An element will keep its original value if the number of operations done on it is even and vice versa. This also means that doing more than 1 operation on the same row or column is unproductive.",
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"Try working backward, start with a matrix of all zeros and try to construct grid using operations.",
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"Start with operations on columns, after doing them what do you notice about each row?",
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"Each row is the exact same. If we then flip some rows, that leaves only two possible arrangements for each row: the same as the original or the opposite."
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],
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"solution": null,
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"status": null,
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"sampleTestCase": "[[0,1,0],[1,0,1],[0,1,0]]",
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