foo.c: In function 'main':
foo.c:25:2: warning: ignoring return value of 'scanf', declared with attribute warn_unused_result [-Wunused-result]
   25 |  scanf("%d",&t);
      |  ^~~~~~~~~~~~~~
foo.c:26:2: warning: ignoring return value of 'scanf', declared with attribute warn_unused_result [-Wunused-result]
   26 |  scanf("%d",&m);
      |  ^~~~~~~~~~~~~~
foo.c:30:5: warning: ignoring return value of 'scanf', declared with attribute warn_unused_result [-Wunused-result]
   30 |     scanf("%d",&n);
      |     ^~~~~~~~~~~~~~

[Hydro](https://hydro.ac)提供评测服务