Discussion @ 1311. Stable Construction @ Timus Online Judge

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I think it is unstable. But how to explain it using the theorem given by this problem?

Test is incorrect Vladimir Yakovlev (USU) 21 Apr 2004 10:39

Read statement:
"...Each brick was placed horizontally and lay on no more than one brick from the lower row..."

Re: Test is incorrect I'm ALIVE. 21 Apr 2004 14:59

Oh sorry, I haven't seen it.
Thank you very much.

Discussion of Problem 1311. Stable Construction