foo.c: In function 'main':
foo.c:28:2: warning: ignoring return value of 'scanf', declared with attribute warn_unused_result [-Wunused-result]
scanf("%d", &n);
^~~~~~~~~~~~~~~
foo.c:31:3: warning: ignoring return value of 'scanf', declared with attribute warn_unused_result [-Wunused-result]
scanf("%d", &a[i]);
^~~~~~~~~~~~~~~~~~
foo.c:33:2: warning: ignoring return value of 'scanf', declared with attribute warn_unused_result [-Wunused-result]
scanf("%d", &k);
^~~~~~~~~~~~~~~
[Hydro](https://hydro.ac)提供评测服务