/in/foo.c: In function 'main':
/in/foo.c:84:17: warning: unused variable 'l' [-Wunused-variable]
     int i,j,k,r,l;
                 ^
/in/foo.c: In function 'run':
/in/foo.c:79:1: warning: control reaches end of non-void function [-Wreturn-type]
 }
 ^
/in/foo.c:72:13: warning: 'j' may be used uninitialized in this function [-Wmaybe-uninitialized]
           if(j<3) return 0;
             ^