foo.cc: In function 'int main()':
foo.cc:10:11: warning: format '%d' expects argument of type 'int', but argument 2 has type 'long long int' [-Wformat=]
   10 |  printf("%d",sum);
      |          ~^  ~~~
      |           |  |
      |           |  long long int
      |           int
      |          %lld
foo.cc:5:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
    5 |  scanf("%d",&n);
      |  ~~~~~^~~~~~~~~
foo.cc:7:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
    7 |   scanf("%d",&x);
      |   ~~~~~^~~~~~~~~

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