foo.cc: In function 'int main()':
foo.cc:13:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   13 |  scanf("%lld", &T);
      |  ~~~~~^~~~~~~~~~~~
foo.cc:15:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   15 |   scanf("%lld", &n);
      |   ~~~~~^~~~~~~~~~~~

正在同步测试数据，请稍后
Found 10 testcases.
[Hydro](https://hydro.ac)提供评测服务