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修改problems/kamacoder/0044.开发商购买土地.md中的python优化暴力代码#2967
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无需遍历到最后一行，因为切分线始终在行之间。对于行和列切分那两层循环，时间复杂度从O(2nm)到O((n-1)m+n(m-1)，且取消了if判断，更加通俗易懂，执行效率高点。
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无需遍历到最后一行（列），因为切分线始终在行（列）之间。
对于行和列切分那两层循环，时间复杂度从O(2nm)到O((n-1)m+n(m-1))，且取消了if判断，更加通俗易懂，执行效率高点。