program fractii;
var n,i,j,nr:integer;
f,g:text;
begin
assign(f,'fractii.in');
assign(g,'fractii.out');
reset(f);
rewrite(g);
read(f,n);
i:=1;
j:=1;
nr:=0;
while i<=n do begin
while j<=n do begin
if i div j=0 then nr:=nr+1;
j:=j+1;
end;
i:=i+1;
end;
write(g,nr);
close(f);
close(g);
end.