foo.cc: In function 'int main()':
foo.cc:110:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  110 |     scanf("%d%d%d", &n, &m, &p);//n个数字， m个操作， 模为p
      |     ~~~~~^~~~~~~~~~~~~~~~~~~~~~
foo.cc:113:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  113 |         scanf("%lld", &a[i]);
      |         ~~~~~^~~~~~~~~~~~~~~
foo.cc:119:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  119 |         scanf("%d", &op);
      |         ~~~~~^~~~~~~~~~~
foo.cc:124:18: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  124 |             scanf("%d%d%lld", &x, &y, &k);
      |             ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~
foo.cc:129:18: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  129 |             scanf("%d%d%lld", &x, &y, &k);
      |             ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~
foo.cc:134:18: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  134 |             scanf("%d%d", &x, &y);
      |             ~~~~~^~~~~~~~~~~~~~~~

Found 3 testcases.
[Hydro](https://hydro.ac)提供评测服务