/in/foo.c: In function 'main':
/in/foo.c:16:26: warning: unused variable 'j' [-Wunused-variable]
  long n,k,m,l,r,l1,r1,v1,j; 
                          ^
/in/foo.c:16:15: warning: unused variable 'r' [-Wunused-variable]
  long n,k,m,l,r,l1,r1,v1,j; 
               ^
/in/foo.c:16:13: warning: unused variable 'l' [-Wunused-variable]
  long n,k,m,l,r,l1,r1,v1,j; 
             ^