/in/foo.c: In function 'main':
/in/foo.c:27:6: warning: unused variable 'i' [-Wunused-variable]
  int i,n,a[9999];
      ^
/in/foo.c: In function 'fun':
/in/foo.c:9:1: warning: control reaches end of non-void function [-Wreturn-type]
 }
 ^
/in/foo.c: In function 'FindMin':
/in/foo.c:24:1: warning: control reaches end of non-void function [-Wreturn-type]
 }
 ^
/in/foo.c:23:2: warning: 'r' may be used uninitialized in this function [-Wmaybe-uninitialized]
  printf("%d",r);
  ^~~~~~~~~~~~~~