b***k
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jsyzghan (谦虚) 于 (Fri Apr 17 15:41:18 2009) 提到:
Given a 3x3 square:
1 2 3
4 5 6
7 8 9
You are allowed to do circular shift on any row, and
circular shift on any column, as many times as you
please. Question: can you switch position of 1 and 2 with
the allowed circular shifts?
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DuGu (火工头陀) 于 (Fri Apr 17 22:25:09 2009) 提到:
The 2nd and the last square in your post is the same :-(
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