/in/foo.c: In function 'main':
/in/foo.c:12:6: error: redefinition of 'min'
  int min=a[0],max=a[0];
      ^~~
/in/foo.c:8:6: note: previous definition of 'min' was here
  int min=999999,max=-999999;
      ^~~
/in/foo.c:12:15: error: redefinition of 'max'
  int min=a[0],max=a[0];
               ^~~
/in/foo.c:8:17: note: previous definition of 'max' was here
  int min=999999,max=-999999;
                 ^~~