var f1,f2:text;
    s,nr1,nr2,nr3,h1,h2,h3,i,j,g,ic:longint;
    nr:int64;
begin
        assign(f1,'plus.in');
        reset(f1);
        assign(f2,'plus.out');
        rewrite(f2);
        read(f1,s);
        read(f1,nr1,h1);
        read(f1,nr2,h2);
        read(f1,nr3,h3);
        for i:=0 to nr1 do
                for j:=0 to nr2 do
                begin
                        g:=(s-i*h1-j*h2);
                        if h3=0 then
                                ic:=nr3+1
                        else ic:=1;
                        if (g<=nr3)and(g>=0)and(g*h3+j*h2+i*h1=s) then
                                nr:=nr+ic;
                end;
        writeln(f2,nr);
        close(f1);
        close(f2);
end.