* 时间复杂度：O(len1 + len2)，空间复杂度：O(len2)（栈+Map的空间）
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。同城约会对此有专业解读
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第十六条 年满十八周岁的居民，不分民族、种族、性别、职业、家庭出身、宗教信仰、教育程度、财产状况、居住期限，都有选举权和被选举权；但是，依照法律被剥夺政治权利的人除外。