Merge pull request #645 from excalibur23/patch-1

Create Merge_Link.py

Author: geekcomputers

Diff for: Merge_Link.py

@@ -0,0 +1,107 @@
+# Python3 program merge two sorted linked 
+# in third linked list using recursive. 
+
+# Node class 
+class Node: 
+	def __init__(self, data): 
+		self.data = data 
+		self.next = None
+
+
+# Constructor to initialize the node object 
+class LinkedList: 
+
+	# Function to initialize head 
+	def __init__(self): 
+		self.head = None
+
+	# Method to print linked list 
+	def printList(self): 
+		temp = self.head 
+		
+		while temp : 
+			print(temp.data, end="->") 
+			temp = temp.next
+
+	# Function to add of node at the end. 
+	def append(self, new_data): 
+		new_node = Node(new_data) 
+		
+		if self.head is None: 
+			self.head = new_node 
+			return
+		last = self.head 
+		
+		while last.next: 
+			last = last.next
+		last.next = new_node 
+
+
+# Function to merge two sorted linked list. 
+def mergeLists(head1, head2): 
+
+	# create a temp node NULL 
+	temp = None
+
+	# List1 is empty then return List2 
+	if head1 is None: 
+		return head2 
+
+	# if List2 is empty then return List1 
+	if head2 is None: 
+		return head1 
+
+	# If List1's data is smaller or 
+	# equal to List2's data 
+	if head1.data <= head2.data: 
+
+		# assign temp to List1's data 
+		temp = head1 
+
+		# Again check List1's data is smaller or equal List2's 
+		# data and call mergeLists function. 
+		temp.next = mergeLists(head1.next, head2) 
+		
+	else: 
+		# If List2's data is greater than or equal List1's 
+		# data assign temp to head2 
+		temp = head2 
+
+		# Again check List2's data is greater or equal List's 
+		# data and call mergeLists function. 
+		temp.next = mergeLists(head1, head2.next) 
+
+	# return the temp list. 
+	return temp 
+
+
+# Driver Function 
+if __name__ == '__main__': 
+
+	# Create linked list : 
+	# 10->20->30->40->50 
+	list1 = LinkedList() 
+	list1.append(10) 
+	list1.append(20) 
+	list1.append(30) 
+	list1.append(40) 
+	list1.append(50) 
+
+	# Create linked list 2 : 
+	# 5->15->18->35->60 
+	list2 = LinkedList() 
+	list2.append(5) 
+	list2.append(15) 
+	list2.append(18) 
+	list2.append(35) 
+	list2.append(60) 
+
+	# Create linked list 3 
+	list3 = LinkedList() 
+
+	# Merging linked list 1 and linked list 2 
+	# in linked list 3 
+	list3.head = mergeLists(list1.head, list2.head) 
+
+	print(" Merged Linked List is : ", end="") 
+	list3.printList()