var a,b,c,d,e,g:longint;
f:real;
begin
read(a,b,c,d,e);
f:=a/b+c+d+e;
if f<=20 then write('YES')
         else write('NO');
         end.
/**************************************************************
	Problem: 1634
	User: admin
	Language: Pascal
	Result: Wrong Answer
****************************************************************/