foo.cc: In function 'int hanshu1(int*, int, int)':
foo.cc:36:6: warning: unused variable 'i' [-Wunused-variable]
  int i=0;int firstfu=0;
      ^
foo.cc:37:6: warning: unused variable 'k' [-Wunused-variable]
  int k=0;
      ^
foo.cc:48:1: warning: no return statement in function returning non-void [-Wreturn-type]
 }
 ^

自豪的采用HydroJudge(https://github.com/hydro-dev/Hydro)进行评测。