/in/foo.cc: In function 'int main(int, char**)':
/in/foo.cc:42:6: warning: unused variable 'Sa' [-Wunused-variable]
  int Sa=0;
      ^~
/in/foo.cc:43:6: warning: unused variable 'Sb' [-Wunused-variable]
  int Sb=0;
      ^~
/in/foo.cc: In function 'int Game(int, int)':
/in/foo.cc:37:1: warning: control reaches end of non-void function [-Wreturn-type]
 }
 ^