Update Readme

Author: ivanmmarkovic

recursion/reverse-linked-list-iterative.py

@@ -0,0 +1,23 @@
+class ListNode:
+    def __init__(self, val=0, next=None):
+        self.val = val
+        self.next = next
+
+
+def reverse_list(self, head: ListNode) -> ListNode:
+    if head is None or head.next is None:
+        return head
+
+    stopped: bool = False
+    prev = head.next
+    head.next = None
+    while not stopped:
+        tmp: ListNode = prev.next
+        prev.next = head
+        head = prev
+        if tmp is not None:
+            prev = tmp
+        else:
+            stopped = True
+
+    return prev