program count;
var N,rez,a,b : integer;
    f,f1 : text;
    A : array [ .. ] of integer;
    B : array [ .. ] of integer;
    C : array [ .. ] of integer;
    D : array [ .. ] of integer;




begin
assign (f, 'count.in');
reset (f);
read (f,N);
close (f);




assign (f1,'count.out');
rewrite (f1);
write (f1,rez);
close (f1);
end.