#165 · #555 · Split Concatenated Strings(分割连接字符串)

Given a list of strings strs, concatenate them in order and then cut the result at some position to form a single loop, which can be read starting anywhere. Each individual string may be reversed before concatenation. Return the lexicographically largest string obtainable. Constraints: 1 <= strs.length <= 1000, 1 <= strs[i].length <= 1000, total length at most 1000.