/in/foo.cc: In function 'int main()':
/in/foo.cc:33:9: warning: unused variable 'ansNo' [-Wunused-variable]
     int ansNo[1002];
         ^~~~~
/in/foo.cc: In function 'int cmp(const void*, const void*)':
/in/foo.cc:20:1: warning: control reaches end of non-void function [-Wreturn-type]
 }
 ^
/in/foo.cc: In function 'int cmp2(const void*, const void*)':
/in/foo.cc:27:1: warning: control reaches end of non-void function [-Wreturn-type]
 } 
 ^

FormatError('config file not found',)