> 4 5
> P 1 2 2
> V 1 3
> V 3 2
> V 1 4
> V 4 2
> V 3 4

Sorry, it should be as follows.

4 6
P 1 2 2
V 1 3
V 3 2
V 1 4
V 4 2
V 3 4

And my question is the same.

> If the position only can be integers, the 3 and 4 are forced to the only integer position between 1 and two, which will contradict with V 3 4 at last. If it is not, this case is Reliable.
> 
> Could you make me clear?
> Thanks

• i believe the statement has made it clear. it's unreliable. (146) frkstyc 2006-08-27 15:19:42
  • I hope to know why it's unreliable? (0) jibee 2009-07-29 17:10:37
• 是啊,我也是被这个问题困扰,不敢下手做这题 (23) smallbox 2009-07-11 23:22:18