- && (dps.size () < 2 || ups[0] >= dps[dps.size () - 2] + 2)
- && (ups.size () < 2 || ups[1] >= dps.back () + 2))
+ && (dps.size () < 2 || ups[0] >= dps[dps.size () - 2] + threshold + 1)
+ && (ups.size () < 2 || ups[1] >= dps.back () + threshold + 1))