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真囧啊 这么道题我居然没看出来先按X为第一关键字 Y为第二关键字 快排 相邻的两个(2*n-1,a*n)的Y之差就是所有竖着的栅栏 然后再按Y第一关键字 X第二关键字 再快排一次 相邻的X之差就是横着的栅栏 这个题 居然就是这么简单......... Followed by: Post your reply here: |
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