EW 7520 then QR 3683 at Barcelona
Hamburg → Barcelona → Algiers
Timetable, Barcelona time
08:30EW 7520 from Hamburg at the gate
20:40QR 3683 to Algiers leaves the gate
12 h 10 apart on the timetable
QR 3683 leaves 12 h 10 after EW 7520 arrives on the timetable: more than half a day, so not a connection we count.