foo.c: In function 'main':
foo.c:12:14: error: expected expression before '%' token
   scanf("%d",%a[i]);
              ^
foo.c:8:6: warning: variable 'temp' set but not used [-Wunused-but-set-variable]
  int temp;
      ^~~~
foo.c:6:6: warning: unused variable 'b' [-Wunused-variable]
  int b=0;
      ^
foo.c:9:2: warning: ignoring return value of 'scanf', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d",&n);
  ^~~~~~~~~~~~~~

[Hydro](https://hydro.ac)提供评测服务