一、原题 链接：Training on Likes Vs Dislikes | Codewars YouTube had a like and a dislike button, which allowed users to express their opinions about particular content. It was set up in such a way that you

一、原题 链接：Training on Two to One | Codewars Take 2 strings s1 and s2 including only letters from a to z. Return a new sorted string (alphabetical ascending), the longest possible, containing distinct