/in/foo.cc: In function 'int main()':
/in/foo.cc:24:7: warning: unused variable 'i' [-Wunused-variable]
   int i,j,l=0,n,m;
       ^
/in/foo.cc:24:9: warning: unused variable 'j' [-Wunused-variable]
   int i,j,l=0,n,m;
         ^
/in/foo.cc:24:11: warning: unused variable 'l' [-Wunused-variable]
   int i,j,l=0,n,m;
           ^