Adding day 5

day5/part1.scala

@@ -0,0 +1,14 @@
+import scala.io.StdIn._
+
+val ASCII_MIN_MAJ_INTERVAL = 32 // 'a' - 'A'
+
+val res = readLine
+  .foldLeft(""){
+    case (acc, chr) => chr match {
+      case _ if acc.isEmpty => chr.toString
+      case _ if (acc.last - chr).abs == ASCII_MIN_MAJ_INTERVAL => acc.dropRight(1)
+      case _ => acc + chr
+    }
+  }
+
+println(res.size)