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Find the number of subsets B of {1, 2, 3, ..., 2005} such that the sum of the elements
of B is congruent to 2006 modulo 2048.
I tried to use base-2 or complete system of residues but failed
of B is congruent to 2006 modulo 2048.
I tried to use base-2 or complete system of residues but failed