/in/foo.cc: In function 'int main()':
/in/foo.cc:32:16: warning: unused variable 'hang' [-Wunused-variable]
  int n,m,p,x,y,hang=0,lie=0,i=0,j=0;
                ^~~~
/in/foo.cc:32:23: warning: unused variable 'lie' [-Wunused-variable]
  int n,m,p,x,y,hang=0,lie=0,i=0,j=0;
                       ^~~
/in/foo.cc:32:33: warning: unused variable 'j' [-Wunused-variable]
  int n,m,p,x,y,hang=0,lie=0,i=0,j=0;
                                 ^