[A2/kyu] 즐거운 파티 (scala)

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class HappyParty {   def inviteCount(first: Array[String], second: Array[String]) = {     require(first.length >= 1 && first.length <= 50)     require(first.length == second.length)       val totalInterest = first ++ second     var maxCount = 1     for (inter <- totalInterest) {       val cnt = totalInterest.count(_ == inter)       if (cnt > maxCount) maxCount = cnt     }     maxCount   } }