foo.cc: In function 'long long int ISAP(std::__cxx11::string)':
foo.cc:36:4: warning: value computed is not used [-Wunused-value]
   t==Gt(S,inf);
   ~^~~~~~~~~~~
foo.cc: In function 'long long int read()':
foo.cc:53:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%lld",&k);
  ~~~~~^~~~~~~~~~~

[Hydro](https://hydro.ac)提供评测服务