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Feb 26, 2018 at 9:12 comment added Nithish I think I can indeed use trie by modifying my approach a bit. :-) Thus I accepted your answer. Thanks again.
Feb 26, 2018 at 9:10 vote accept Nithish
Feb 26, 2018 at 7:32 comment added Neil @nnb You wouldn't use a trie to determine if a digit exists in a number. The point of the trie was to be able to perform a quick lookup, which is my understanding the point of attempting to reorganize the data by digit. If that's not your case, then I don't think I understand the problem. What is the problem here (that is to say, not what you want to do, what are you trying to solve)?
Feb 25, 2018 at 2:06 comment added Nithish Thank you very much for the excellent answer! I see the drawback of my method. Thank you very much for pointing me at trie. But I do see one problem. Like I mentioned in the question, I only know the digits and not the order in which they have to occur. Thus I will have to traverse the trie multiple times to extract all possible outcomes. Is my understanding wrong?
Feb 23, 2018 at 8:13 history answered Neil CC BY-SA 3.0