dynamic array, pointers and many more should have been taught earlier than this video. This video is blurting out the solution and not explaining any concept.
This video needs so many concepts to be learnt before
yes please tell from to learn the concepts mentioned in this video to grasp because in previous models they have not been discussed.
For that you have to tell me in which course you are enrolled in?
c++ launchpad course
What you can do is mark this video, go on for the rest of the topic as teaching in classes. When you’ll cover them you can come back again to this problem. 
yeah, I can do that. Thanks
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