Data commit

Task/Look-and-say-sequence/Swift/look-and-say-sequence.swift

@@ -0,0 +1,28 @@
+func lookAndSay(_ seq: [Int]) -> [Int] {
+  var result = [Int]()
+  var cur = seq[0]
+  var curRunLength = 1
+
+  for i in seq.dropFirst() {
+    if cur == i {
+      curRunLength += 1
+    } else {
+      result.append(curRunLength)
+      result.append(cur)
+      curRunLength = 1
+      cur = i
+    }
+  }
+
+  result.append(curRunLength)
+  result.append(cur)
+
+  return result
+}
+
+var seq = [1]
+
+for i in 0..<10 {
+  print("Seq \(i): \(seq)")
+  seq = lookAndSay(seq)
+}