insert at beginning of singly linked list

Author: keshavsingh3197

HackerRank/Linked Lists/insert-at-beginning.py

@@ -0,0 +1,31 @@
+class node:
+    def __init__(self,data):
+        self.data=data
+        self.next=None
+class LinkedList:
+    def __init__(self):
+        self.start=None
+    def display(self):
+        if self.start==None:
+            print('list is empty')
+        else:
+            temp=self.start
+            while temp:
+                print(temp.data)
+                temp=temp.next
+    def InsertAtHead(self,n):
+        if self.start is None:
+            self.start=node(n)
+        else:
+            temp=self.start
+            self.start=node(n)
+            self.start.next=temp
+l=LinkedList()
+for i in range(int(input())):
+    n=int(input())
+    if i==0:
+        l.start=node(n)
+        ptr=l.start
+    else:
+        ptr.next=node(n)
+        ptr=ptr.next