foo.cc: In function 'int main()':
foo.cc:15:17: warning: format '%d' expects argument of type 'int', but argument 2 has type 'long long unsigned int' [-Wformat=]
   15 |     printf("%I64d",ans);
      |             ~~~~^  ~~~
      |                 |  |
      |                 |  long long unsigned int
      |                 int
      |             %I64lld

[Hydro](https://hydro.ac)提供评测服务