while finding the source parent and destination parent we have already called find() and have got souce parent and destination parent .
in the video when parent_of _src != parnt_of_destiantion
we have called union on both src parent and destination parent
but in union sir again called the find function to find out the parent (i think this is unnecesay )
i want to know whether this calling of find () in union is must or not
It is not necessary to again call find function in union. If you have already called fing function to check whether the parent of source and destination are equal or not, then simply make parent of source as parent of destination in union.
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