/in/foo.cc: In function 'int main()':
/in/foo.cc:7:11: warning: unused variable 'm' [-Wunused-variable]
     int n,m,j,k,i,sum=0;
           ^
/in/foo.cc:8:9: warning: unused variable 'x' [-Wunused-variable]
     int x,y;
         ^
/in/foo.cc:8:11: warning: unused variable 'y' [-Wunused-variable]
     int x,y;
           ^

KeyError('config.ini',)