Given a string, we have to find out all subsequences of it. A String is a subsequence of a given String, that is generated by deleting some character of a given string without changing its order.
Input : abc Output : a, b, c, ab, bc, ac, abc Input : aaa Output : a, aa, aaa
Using Pick and Don’t Pick concept :
cba cb ca c ba b a
a b c ab ac bc abc
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