Common Board @ Timus Online Judge

HHEELLPP !!!! How can I check if the number is devides by 7 ???

Posted by Romanchik Vitaly 9 Jul 2003 21:34

HHEELLPP !!!! How can I check if the number is devides by 7 ???

A hint

Posted by TheBlaNK 9 Jul 2003 22:17

z=x+y

z mod c = (x mod c + y mod c) mod c

c is only 7.It's not big.
and the number always has 1, 2, 3, and 4 .

Good luck,
TheBlaNK

P.S. two of my friends used search (permute them) and got AC. - -'

Oops!! i misunderstand the question,sorry.i think u ask for 1095 (-)

Posted by TheBlaNK 10 Jul 2003 01:05

> z=x+y
>
> z mod c = (x mod c + y mod c) mod c
>
> c is only 7.It's not big.
> and the number always has 1, 2, 3, and 4 .
>
> Good luck,
> TheBlaNK
>
> P.S. two of my friends used search (permute them) and got AC. - -'

It's OK ! I mean this problem ! Thank you wery much !!!

Posted by Romanchik Vitaly 10 Jul 2003 02:25

> > z=x+y

> >

> > z mod c = (x mod c + y mod c) mod c

> >

> > c is only 7.It's not big.

> > and the number always has 1, 2, 3, and 4 .

> >

> > Good luck,

> > TheBlaNK

> >

> > P.S. two of my friends used search (permute them) and got AC. - -'