uses crt;
var a: array[1..100] of integer;
i,n,s: integer;
begin
clrscr;
write ('nhap so luong PT: '); readln (N);
for i:=1 to n do
begin
write ('nhap PT thu ',i,': '); readln (a[i]);
if a[i] mod 2=0 then s:=s+a[i];
end;
writeln ('tong la: ',s);
readln;
end.