Meaning of 0.00 time && 0k memory

[shoyeb]

i submitted a sol. for sumsums

spoj.pl/problems/SUMSUMS/

& it got accepted in 0.00 time & 0k memory ...but after dat i came to know dat my sol. was wrong

hw can ny wrong sol. be accepted ...or 0.00 time & 0k memory has got special meaning..

[michi]

Hey there,
i know this thread has been dead for two years, but i definitely would be interested in this error too.
Also, there are such submissions in our contest, what seems very strange.

So what is it about: time: 0.00 and 0k memory usage?

Will be thankful for answers.

[japi]

1. When score is % of correctly solved tests and score = 0
2. Bug