Py3 C++計數bitmask與2 pointers速解Leetcode2273 Find Resultant Array After Removing Anagrams
字串長度最長也只有10，四個bits一組，用bitmask解題
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The maximum length of a string is only 10, and four bits are grouped together. Use bitmask to solve the problem.
[Py3 code請進]