/in/foo.c: In function 'main':
/in/foo.c:8:32: warning: unused variable 'y' [-Wunused-variable]
  int a[10000],b[10000],n1,n2,x,y;
                                ^
/in/foo.c:8:30: warning: unused variable 'x' [-Wunused-variable]
  int a[10000],b[10000],n1,n2,x,y;
                              ^