As Graham suggests, you'll need to use common sense.
Strictly speaking make sure they’re for your own use or a gift.
Not many folk get pulled out, but if it's you then you'll likely only get grilled if you have more than 800 cigarettes or more than 1kg tobacco.
Those customs people may want to know where you bought them, how you paid for them (should be tax and duty paid already), how much you normally smoke, who you bought them for and how often you travel.
They may ask who's paying or how much you intend to charge. The answer should be you're paying, there's no charge as they're gifts only.
You'd be unlucky to get stopped unles you look shifty![]()