foo.c: In function 'main':
foo.c:24:17: warning: format '%d' expects argument of type 'int *', but argument 2 has type 'int' [-Wformat=]
   24 |         scanf("%d",x);
      |                ~^  ~
      |                 |  |
      |                 |  int
      |                 int *
foo.c:24:9: warning: 'x' is used uninitialized [-Wuninitialized]
   24 |         scanf("%d",x);
      |         ^~~~~~~~~~~~~
foo.c:20:17: note: 'x' was declared here
   20 |         int i,n,x,a[10005];
      |                 ^

[Hydro](https://hydro.ac)提供评测服务