var
  w,b,n,k : longint;
begin
  readln(w);
  readln(b);
  readln(n);
  k:=0;
  if (1<=w)and(w<=10000) then
  if (1<=b)and(b<=10000) then
  if (1<=n)and(n<=10000) then
  if n<=w+b then k:=1;
  if (k>0) then writeln('YES')
  else writeln('NO');
end.