var a:array[1..40] of integer;
k,i,s:integer;  sr:real;
begin
for i:=1 to 40 do begin a[i]:=random(20); write(a[i]:4); end;
for i:=1 to 40 do
if a[i] mod 2<>0 then begin inc(k); s:=s+a[i];end;
sr:=s/k;
writeln;
writeln('sr=',sr:3:0);
end.