var r,d:longint;
    f,g:text;

function calcul(r:longint;d:word):word;
var i,j:longint;
    p:longint;
    nr,max:word;
begin
nr:=0;
p:=1;
for i:=1 to r-1 do
 begin
 if r-i>=i then
  max:=r-i
 else
 if r-i<i then
  max:=i;
 p:=1;
 for j:=max+1 to r do
  p:=p*j;
 for j:=2 to r-max do
  p:=p div j;
 if p mod d=0 then
  inc(nr);
 end;
calcul:=nr;
end;


begin
assign(f,'pascal.in');
reset(f);
assign(g,'pascal.out');
rewrite(g);
readln(f,r,d);
writeln(g,calcul(r,d));
close(f);
close(g);
end.