foo.c: In function 'main':
foo.c:20:2: warning: ignoring return value of 'scanf', declared with attribute warn_unused_result [-Wunused-result]
20 | scanf("%d",&n);
| ^~~~~~~~~~~~~~
foo.c:23:3: warning: ignoring return value of 'scanf', declared with attribute warn_unused_result [-Wunused-result]
23 | scanf("%d",&a[i]);
| ^~~~~~~~~~~~~~~~~
foo.c:26:5: warning: ignoring return value of 'scanf', declared with attribute warn_unused_result [-Wunused-result]
26 | scanf("%d",&a[i]);
| ^~~~~~~~~~~~~~~~~
foo.c:29:2: warning: ignoring return value of 'scanf', declared with attribute warn_unused_result [-Wunused-result]
29 | scanf("%d",&x);
| ^~~~~~~~~~~~~~
[Hydro](https://hydro.ac)提供评测服务