I don't know if this is the right forum to ask this,
but the spoj go-compiler is gcc from july 2010, four years ago. It would be great if this could be updated to a newer version.
The reason why this is important is that 2010 was pre version 1.0, which stabilized the language. Hence it is not just a lot slower, but it also has weird syntactical differences, which causes lots of compiler errors.
The good news is that since the language is getting more stable, if the go-compiler used was to be updated to version 1.3, or any other 1.x release, it would probably be great for another 4 years.
Thank you for creating a great site!
Thomas