var f:text;
    i,j,n,nr,max:integer;
begin
assign (f,'fractii.in');
reset (f);
read (f,n);
for i:=1 to n do
for j:=1 to n do
begin
if i>j then max:=i else max:=j;
while not((j mod max=0) and (i mod max=0)) do
max:=max-1;
if max=1 then nr:=nr+1;
end;
close (f);
assign (f,'fractii.out');
rewrite (f);
write (f,nr);
close (f);
end.