var p,n,i,min:longint;
    f,g:text;
    ok:boolean;
begin
assign(f,'fact.in');
assign(g,'fact.out');
reset(f);
rewrite(g);
readln(f,p);
ok:=false;
i:=1;
repeat
if (i div 5=p-1) then
   begin
   writeln(g,i);
   ok:=true;
   end;
i:=i+1;
until (ok=true) or (i=2147483647);
if not(ok) then writeln(g,-1);

close(f);
close(g);
end.