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每一行和列上的元素都恰好构成集合{1， 2， ... 2n-1}In Reply To:For every integer i (1 <= i <= n), all elements in the i-th row and i-th column make the set {1, 2, 3, …, 2n - 1}. 什么意思？ Posted by:dongshanluo at 2006-07-22 14:44:31 Followed by: Post your reply here: |
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