Power Set in Lexicographic order
There is a set contains N no. of unsorted characters. You have to find out the power sets in lexicographic order of a given set of numbers and print them.
Input: Test case T //T no. of line with the value of N and corresponding values. E.g. 2 4 d c b a 2 f u 1<=T<=100 1<=N<=1000 Output: Print the power subsets of the set in lexicographic order.
T=2 N=4 d c b a Output: a a b a b c a b c d a b d a c a c d a d b b c b c d b d c c d d N=2 f u Output: f f u u
Here we use the vector STL to store the subsets.
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