program factorial;
var f,g:text;
    p,n,i:longint;
begin
assign(f,'fact.in');
assign(g,'fact.out');
reset(f);
rewrite(g);
read(f,p);
if (p=0)then write(g,1) else
   begin
        for i:=1 to p do n:=n+5;
        write(g,n);
        end;
close(f);
close(G);
end.