This is pdfTeX, Version 3.1415926-2.5-1.40.14 (TeX Live 2013/Debian) (format=pdflatex 2015.6.14)  5 OCT 2015 15:03
entering extended mode
 restricted \write18 enabled.
 %&-line parsing enabled.
**problem.en.tex
(./problem.en.tex
LaTeX2e <2011/06/27>
Babel <3.9h> and hyphenation patterns for 37 languages loaded.
! Undefined control sequence.
l.1 \problemname
                {Floppy Music}
? 
! Emergency stop.
l.1 \problemname
                {Floppy Music}
End of file on the terminal!

 
Here is how much of TeX's memory you used:
 5 strings out of 493889
 145 string characters out of 6156712
 49073 words of memory out of 5000000
 3367 multiletter control sequences out of 15000+600000
 3640 words of font info for 14 fonts, out of 8000000 for 9000
 798 hyphenation exceptions out of 8191
 5i,0n,1p,43b,8s stack positions out of 5000i,500n,10000p,200000b,80000s
!  ==> Fatal error occurred, no output PDF file produced!