OJ Board

I have so solved some prob. but I allways got P.E.Why???
Can some body tell me what will make P.E.
thanx.

P.E. is often obtained when you misunderstand some things in the input such as "there should be an empty line between input blocks", this means that you should output a blank line but not in the last case.

Sometimes, we don't see the sample output format, on love calculator (10424) you should output a ratio, folowed by a '%' sign, but there must be a space between the ratio and the '%', this would cause P.E.

In rare occasions, judge correction program is not properly adjusted to the output description and you get P.E.

P.E. is often obtained when you misunderstand some things in the input such as "there should be an empty line between input blocks", this means that you should output a blank line but not in the last case.

Sometimes, we don't see the sample output format, on love calculator (10424) you should output a ratio, folowed by a '%' sign, but there must be a space between the ratio and the '%', this would cause P.E.

In rare occasions, judge correction program is not properly adjusted to the output description and you get P.E.