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2_sat2-sat2_sat good question.
Because D is less than 8dleq8d is less than 8, Coe takes into account that Volley O(2d)O(2^d)O(2d) enumerates all x.
It is found that if'x'takes'a' or'b'here, it can contain the case of this person choosing A/B/CA/B/CA/B/C, so only enumerating two kinds is used to get qwq.
After Fuli enumerates, a certain string strstrstr is obtained.
Then consider transforming this problem into a...