Consider 16 non-empty sets each contains up to 2^16 numbers, which are between 0 to 2^16-1 inclusive and each number may↵
appear in more than one sets, obviously.↵
The goal is to find minimum number of numbers which we have at least one number from each set.↵
I tried greedy approach, clearly is wrong, also have found general form of thisquestionproblem which is np-complete. [link](https://en.wikipedia.org/wiki/Set_cover_problem)↵
↵
appear in more than one sets, obviously.↵
The goal is to find minimum number of numbers which we have at least one number from each set.↵
I tried greedy approach, clearly is wrong, also have found general form of this
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