Program HOC24;
Var i: integer;
a: array[1..32000] of integer;
t: longint;
begin
t:=0;
for i:=1 to 20 do
begin
write('Nhap so thu ',i,' : '); readln(a[i]);
if a[i] mod 2<>0 then t:=t+a[i];
end;
write('Tong cac so le trong 20 so do la : ',t);
readln
end.