Data commit

Task/Look-and-say-sequence/Nim/look-and-say-sequence.nim

@@ -0,0 +1,19 @@
+iterator lookAndSay(n: int): string =
+  var current = "1"
+  yield current
+  for round in 2..n:
+    var ch = current[0]
+    var count = 1
+    var next = ""
+    for i in 1..current.high:
+      if current[i] == ch:
+        inc count
+      else:
+        next.add $count & ch
+        ch = current[i]
+        count = 1
+    current = next & $count & ch
+    yield current
+
+for s in lookAndSay(12):
+  echo s