added lc_19_sol

Author: Afraz0Khan

19.remove-nth-from-end-of-list.py

@@ -0,0 +1,25 @@
+
+
+class ListNode:
+    def __init__(self, val=0, next=None):
+        self.val = val
+        self.next = next
+
+
+
+
+def removeNthFromEnd(self, head: ListNode, n: int) -> ListNode:
+    dummy = ListNode(0, head)
+    current = dummy
+    second = head
+    
+    while n > 0 and second:
+        second = second.next
+        n-=1
+    
+    while second:
+        second = second.next
+        current = current.next
+    current.next = current.next.next
+    
+    return dummy.next