foo.cc: In function 'int main()':
foo.cc:10:6: warning: unused variable 'x' [-Wunused-variable]
  int x,y;//k
      ^
foo.cc:10:8: warning: unused variable 'y' [-Wunused-variable]
  int x,y;//k
        ^
foo.cc: In function 'int getin(int*, int)':
foo.cc:33:6: warning: unused variable 'm' [-Wunused-variable]
  int m;
      ^

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