Initial data commit

Task/Ackermann-function/Scala/ackermann-function-1.scala

@@ -0,0 +1,5 @@
+def ack(m: BigInt, n: BigInt): BigInt = {
+  if (m==0) n+1
+  else if (n==0) ack(m-1, 1)
+  else ack(m-1, ack(m, n-1))
+}

Task/Ackermann-function/Scala/ackermann-function-2.scala

@@ -0,0 +1,4 @@
+val ackMap = new mutable.HashMap[(BigInt,BigInt),BigInt]
+def ackMemo(m: BigInt, n: BigInt): BigInt = {
+  ackMap.getOrElseUpdate((m,n), ack(m,n))
+}