/in/foo.c: In function 'main':
/in/foo.c:19:27: warning: unused variable 'j' [-Wunused-variable]
  int n,i,k,m,l,r,l1,r1,v1,j; 
                           ^
/in/foo.c:19:16: warning: unused variable 'r' [-Wunused-variable]
  int n,i,k,m,l,r,l1,r1,v1,j; 
                ^
/in/foo.c:19:14: warning: unused variable 'l' [-Wunused-variable]
  int n,i,k,m,l,r,l1,r1,v1,j; 
              ^