foo.cpp: In function 'LL llabs(LL)':
foo.cpp:10:4: error: redefinition of 'LL llabs(LL)'
c:\mingw32\bin\../lib/gcc/mingw32/4.6.1/../../../../include/stdlib.h:509:48: error: 'long long int llabs(long long int)' previously defined here
foo.cpp: In function 'int main()':
foo.cpp:31:8: warning: unused variable 'j' [-Wunused-variable]