/in/foo.c: In function 'main':
/in/foo.c:5:15: warning: unused variable 's' [-Wunused-variable]
     int i,j,k,s,n,min;
               ^
/in/foo.c:5:13: warning: unused variable 'k' [-Wunused-variable]
     int i,j,k,s,n,min;
             ^