e.g.
7
4 3 1 5 4 2 1

the first frog shall have 4 neighbours, right?

but from the sample output it is having 5 neighbours.

the same doubt on the rest frogs.

shall this be the right answer for it:

YES
0 1 1 1 1 0 0
1 0 0 1 1 0 0
1 0 0 0 0 0 0
1 1 0 0 1 1 1
1 1 0 1 0 1 0
0 0 0 1 1 0 0
0 0 0 1 0 0 0

??

• 原来sample有误,现在改好了,不过数据没问题的,此题也有special judge (372) hawk 2004-05-15 10:37:46