/in/foo.cc: In function 'int main()':
/in/foo.cc:6:15: warning: unused variable 'j' [-Wunused-variable]
     int x,y,i,j,num=0,ans=1,x1,y1;
               ^
/in/foo.cc:6:17: warning: unused variable 'num' [-Wunused-variable]
     int x,y,i,j,num=0,ans=1,x1,y1;
                 ^~~
/in/foo.cc:6:29: warning: variable 'x1' set but not used [-Wunused-but-set-variable]
     int x,y,i,j,num=0,ans=1,x1,y1;
                             ^~