def alternateSegregate(l):
if l.head is None:
return
first, second = LinkedList(), LinkedList()
lastNode = l.head
while lastNode.next:
lastNode = lastNode.next
current = l.head
lNode = lastNode
prev = None
while current != lastNode:
next = current.next
current.next = next.next
lNode.next = next
next.next = None
lNode = lNode.next
prev = current
current = current.next
if lNode == lastNode:
break
first.head = l.head
second.head = current if lastNode == lNode else current.next
if lastNode != lNode:
current.next = None
else:
print current.data
prev.next = None
return [first, second]
def mergeKSortedLists(lists):
while len(lists) > 1:
p, q = lists.pop(0), lists.pop(0)
lists.append(merge(p, q))
l = LinkedList()
l.head = lists[0]
return l
def intersectionOfSortedLists(a, b):
result = LinkedList()
while a and b:
if a.data == b.data:
result.append(a.data)
a, b = a.next, b.next
elif a.data > b.data:
b = b.next
else:
a = a.next
return result
def test_clean(self):
linked_list = LinkedList()
linked_list.add_in_tail(self.n1)
linked_list.add_in_tail(self.n2)
linked_list.add_in_tail(self.n3)
linked_list.clean()
self.assertEqual(linked_list.len(), 0)
def test_find_all_5(self):
linked_list = LinkedList()
linked_list.add_in_tail(self.n1)
linked_list.add_in_tail(self.n2)
linked_list.add_in_tail(self.n3)
linked_list.add_in_tail(self.n4)
linked_list.add_in_tail(self.n5)
self.assertEqual(linked_list.find_all(12), [self.n1, self.n2, self.n4, self.n5])
def test_delete_all_2(self):
linked_list = LinkedList()
linked_list.add_in_tail(self.n1)
linked_list.add_in_tail(self.n3)
linked_list.add_in_tail(self.n2)
linked_list.delete(12, True)
self.assertEqual(linked_list.head, self.n3)
self.assertEqual(linked_list.tail, self.n3)
def test_delete_8(self):
linked_list = LinkedList()
linked_list.add_in_tail(self.n1)
linked_list.add_in_tail(self.n2)
linked_list.add_in_tail(self.n4)
linked_list.delete(12)
self.assertEqual(linked_list.head, self.n2)
self.assertEqual(linked_list.tail, self.n4)
def test_insert_2(self):
linked_list = LinkedList()
linked_list.add_in_tail(self.n1)
linked_list.add_in_tail(self.n2)
linked_list.add_in_tail(self.n3)
linked_list.insert(self.n3, self.n4)
self.assertEqual(self.n3.next, self.n4)
self.assertEqual(linked_list.tail, self.n4)
def test_insert_3(self):
linked_list = LinkedList()
linked_list.add_in_tail(self.n1)
linked_list.add_in_tail(self.n2)
linked_list.add_in_tail(self.n3)
linked_list.insert(self.n2, self.n6)
self.assertEqual(self.n2.next, self.n6)
self.assertEqual(self.n6.next, self.n3)
def test_len_3_elements(self):
linked_list = LinkedList()
linked_list.add_in_tail(self.n1)
linked_list.add_in_tail(self.n2)
linked_list.add_in_tail(self.n3)
self.assertEqual(linked_list.len(), 3)
def sort(l):
a = LinkedList()
node = l.head
while node:
temp = node.next
node.next = None
sortedInsert(a, node)
node = temp
l.head = a.head
def test_delete_4(self):
linked_list = LinkedList()
linked_list.add_in_tail(self.n3)
linked_list.add_in_tail(self.n4)
linked_list.add_in_tail(self.n6)
linked_list.delete(12)
self.assertEqual(linked_list.head, self.n3)
self.assertEqual(self.n3.next, self.n6)
self.assertEqual(linked_list.tail, self.n6)
def initialize():
head = Node(-1)
linked = LinkedList(head)
# Create continuous node to head
for i in range(0, 5):
linked.add_end(i)
# Printing out the result
print("Print Linked List Iterate Result")
# expected to show) -1, 0, 1, 2, 3, 4
linked.to_string()
return head, linked
def load_network(graph, network):
"""
Loads a network from a given file or object(if saved earlier)
:param graph: Graph Object
:param network: network file
:return: None
"""
network = open(network, "r") # open given file
for line in network: # iterate over whole file line by line
line = line.rstrip().lstrip(
) # removes any white spaces after or before the node value
if ':' not in line: # if line has node to add
graph.list.add_last(LinkedList(line)) # add node to the grpah
else: # if line has nodes to connect
vertices = line.split(
':'
) # makes list of two nodes by spliting the line on delimiter
vertices[0] = vertices[0].rstrip().lstrip() #
vertices[1] = vertices[1].rstrip().lstrip()
graph.connect(vertices[0],
vertices[1]) # make a connection between node
network.close() # close the open file
class ListStack(object):
'''
Pushdown Stack(linked-list implmentation).
-------------
Stack(): init queue
push(item): push an item
pop(): remove the most recently added item
top(): get the most recently added item
empty = isEmpty(): tell stack is empty
stackSize = size(): get size of stack
clear(): reset the stack
'''
def __init__(self):
self.list = LinkedList()
def push(self, item):
self.list.addHead(item)
def isEmpty(self):
return self.list.isEmpty()
def pop(self):
if self.isEmpty():
return
self.list.remove(0)
def top(self):
if self.isEmpty():
return None
return self.list.get(0).item
def size(self):
return self.list.size()
def clear(self):
self.list = LinkedList()
def add(a, b):
result = LinkedList()
lastNode = None
carry = 0
while a and b:
sum = a.data + b.data + carry
if lastNode:
lastNode.next = Node(sum % 10)
lastNode = lastNode.next
else:
result.head = Node(sum % 10)
lastNode = result.head
carry = sum / 10
a, b = a.next, b.next
while a:
sum = a.data + carry
if lastNode:
lastNode.next = Node(sum % 10)
lastNode = lastNode.next
else:
result.head = Node(sum % 10)
lastNode = result.head
carry = sum / 10
a = a.next
while b:
sum = b.data + carry
if lastNode:
lastNode.next = Node(sum % 10)
lastNode = lastNode.next
else:
result.head = Node(sum % 10)
lastNode = result.head
carry = sum / 10
b = b.next
if carry == 1:
if lastNode:
lastNode.next = Node(1)
else:
result.head = Node(1)
return result
def merge(a, b):
l = LinkedList()
while a and b:
if a.data <= b.data:
temp = a.next
a.next = l.head
l.head = a
a = temp
else:
temp = b.next
b.next = l.head
l.head = b
b = temp
while a:
temp = a.next
a.next = l.head
l.head = a
a = temp
while b:
temp = b.next
b.next = l.head
l.head = b
b = temp
return l
def add(a, b):
l1 = a.size()
l2 = b.size()
p = a.head if l1 > l2 else b.head
q = a.head if l1 <= l2 else b.head
d = abs(l1 - l2)
s = []
while d > 0:
s.append([p.data, 0])
p = p.next
d -= 1
while p and q:
s.append([(p.data + q.data) % 10, (p.data + q.data) / 10])
p = p.next
q = q.next
l = LinkedList()
carry = 0
while len(s) > 0:
node = s.pop()
l.push((node[0] + carry) % 10)
carry = node[1] + (node[0] + carry) / 10
if carry > 0:
l.push(carry)
return l
if (a.data > b.data):
a.data, b.data = b.data, a.data
temp = b
while b.next and b.data > b.next.data:
b = b.next
prev, ptr = None, b
while ptr and ptr.data < temp.data:
prev, ptr = ptr, ptr.next
prev.next = temp
temp.next = ptr
if a.next is None:
break
a = a.next
while a.next:
a = a.next
a.next = b
a = LinkedList()
a.append(2)
a.append(4)
a.append(7)
a.append(8)
a.append(10)
b = LinkedList()
b.append(1)
b.append(3)
b.append(12)
merge(a.head, b.head)
a.printList()
def reverse(a):
prev, current = None, a
while current:
next = current.next
current.next = prev
prev, current = current, next
return prev
def mergeAlternate(a, b):
head = tail = Node('x')
while a and b:
tail.next = a
tail = tail.next
a = a.next
tail.next = b
tail = tail.next
b = b.next
if a:
tail.next = a
if b:
tail.next = b
return head.next
a = LinkedList()
s = [10, 4, 7, 1, 3, 8, 9, 2, 0, 5, 6]
for i in s:
a.append(i)
a.printList()
a.head = rearrange(a.head)
a.printList()
print("\_____/_|_| |_|_|\_\___|\__,_| \_____/_|___/\__|")
menu = """
╔═══ MENU ════════════════════════╗
║ 1: Insert begin ║
║ 2: Insert end ║
║ 3: Insert position ║
║ 4: Delete begin ║
║ 5: Delete end ║
║ 6: Delete in position ║
║ 7: Insert random values ║
║ 0: Exit ║
╚═════════════════════════════════╝
"""
llist = LinkedList()
if __name__ == "__main__":
while True:
print(menu)
option = int(input("Select an option: "))
if option == 0:
break
elif option == 1:
value = int(input("Type a value to insert at the beginning: "))
llist.insert_begin(value)
def reverse(node, k, i):
current, next, prev, count = node, None, None, 0
if i == 0:
while current and count < k:
next = current.next
current.next = prev
prev = current
current = next
count += 1
else:
while current and count < k:
prev, current, next = current, current.next, current.next
count += 1
if next:
if i == 0:
node.next = reverse(next, k, 1)
else:
prev.next = reverse(next, k, 0)
return prev if i == 0 else node
l = LinkedList()
for i in range(1, 9):
l.append(i)
l.printList()
l.head = reverse(l.head, 3, 0)
l.printList()
from list import Node
from list import LinkedList
def multiply(a, b):
n1 = n2 = 0
while a:
n1 = n1 * 10 + a.data
a = a.next
while b:
n2 = n2 * 10 + b.data
b = b.next
return n1 * n2
a = LinkedList()
a.append(9)
a.append(4)
a.append(6)
a.printList()
b = LinkedList()
b.append(8)
b.append(4)
b.printList()
print multiply(a.head, b.head)
tail = head
while a and b:
if a.data <= b.data:
tail.next = a
a = a.next
else:
tail.next = b
b = b.next
tail = tail.next
if a:
tail.next = a
if b:
tail.next = b
return head
def reverse(node):
prev, current = None, node
while current:
next = current.next
current.next = prev
prev, current = current, next
return prev
s = [10, 40, 53, 30, 67, 12, 89]
a = LinkedList()
for i in s:
a.append(i)
a.printList()
a.head = sort(a.head)
a.printList()
taill.next = a
taill = taill.next
elif a.data == x:
taile.next = a
taile = taile.next
else:
tailg.next = a
tailg = tailg.next
a.next = None
a = nextA
headl = headl.next
headg = headg.next
heade = heade.next
if headl:
if heade:
taill.next = heade
else:
taill.next = headg
if heade:
taile.next = headg
head = headl if headl else heade if heade else headg
return head
a = LinkedList()
s = [1, 4, 3, 2, 5, 2, 3]
for i in s:
a.append(i)
a.printList()
a.head = partition(a.head, 3)
a.printList()
#!/usr/bin/env python
# coding: utf-8
from list import LinkedList
userInputExpression = None
userInputCel = None
a = LinkedList()
b = LinkedList()
a.addFirst({
'label': 'a1',
'value': '5'
})
'''
while(True):
userInputCel = raw_input('Where do you want insert? \n')
userInputExpression = raw_input('Enter a math expression: \n')
result = None
if userInputCel[0].lower() == 'a':
print 'A cedule'
result = a.find({'label': userInputCel})
if result == None:
print 'not'
else:
print result.get_data()
elif userInputCel[0].lower() == 'b':
return
prevL = None
while True:
if a == l:
break
a, l, prevL = a.next, l.next, l
print "Loop begins at:", l.data
prevL.next = None
def loopNode(a):
fast, slow = a, a
while fast and fast.next:
fast = fast.next.next
slow = slow.next
if fast == slow:
return fast
return None
a = LinkedList()
for i in range(10):
a.append(i)
a.printList()
detectAndRemoveLoop(a.head)
lastNode = a.head
while lastNode.next:
lastNode = lastNode.next
lastNode.next = a.head.next.next.next.next.next
detectAndRemoveLoop(a.head)
a.printList()
prevI, prevJ = None, None
while j and k > 1:
prevJ, j = j, j.next
k -= 1
if j is None:
return newHead
kthFromBegin, kthFromEnd = j, i
while j.next:
prevI, kthFromEnd = kthFromEnd, kthFromEnd.next
j = j.next
if kthFromBegin == kthFromEnd:
return newHead
if prevI is None:
newHead = kthFromBegin
prevJ.next = kthFromEnd
elif prevJ is None:
newHead = kthFromEnd
prevI.next = kthFromBegin
else:
prevI.next = kthFromBegin
prevJ.next = kthFromEnd
kthFromBegin.next, kthFromEnd.next = kthFromEnd.next, kthFromBegin.next
return newHead
a = LinkedList()
for i in range(1, 9):
a.append(i)
a.printList()
a.head = swap(a.head, 1)
a.printList()
from list import LinkedList from node import Node print "\nCreating LinkedList from python list" my_list = LinkedList([Node(2), None, Node(0), Node(0), Node(4)]) my_list.to_string() print "\nAdding single node" my_list.add_node(Node(5)) my_list.to_string() print "\nAdding nodes from python tuple" my_list.add_nodes((Node(0), Node(20), Node(-1))) my_list.to_string()
def deleteMiddlePoints(node):
while node and node.next and node.next.next:
if node.data[0] == node.next.data[0] and node.data[
0] == node.next.next.data[0]:
node.next = node.next.next
continue
if node.data[1] == node.next.data[1] and node.data[
1] == node.next.next.data[1]:
node.next = node.next.next
continue
node = node.next
a = LinkedList()
a.append([0, 10])
a.append([1, 10])
a.append([5, 10])
a.append([7, 10])
a.append([7, 5])
a.append([20, 5])
a.append([40, 5])
a.printList()
deleteMiddlePoints(a.head)
a.printList()
b = LinkedList()
b.append([2, 3])
b.append([5, 3])
b.append([7, 3])
def clear(self):
self.list = LinkedList()
a = [0] * 3
current = node
while current:
a[current.data] += 1
current = current.next
current = node
i = 0
while current and i < 3:
current.data = i
current = current.next
a[i] -= 1
if a[i] == 0:
i += 1
l = LinkedList()
l.append(1)
l.append(0)
l.append(2)
l.append(2)
l.append(1)
l.append(1)
l.append(1)
l.append(0)
l.append(0)
l.append(0)
l.append(2)
l.append(1)
l.append(1)
l.append(2)
l.append(1)
from list import LinkedList
import time
import os
if __name__ == '__main__':
my = LinkedList()
my.insert(1)
my.insert(2)
my.insert(3)
my.insert(5)
my.insert(7)
#my.disp()
my.insertAfter(6,7)
#my.disp()
my.insertAfter(4,5)
#my.disp()
my.deleteBeg()
my.insertEnd(0)
my.disp()
my.deleteEnd()
my.disp()
time.sleep(5)
os.system("clear")
my.deleteAny(5)
my.disp()
if l1 > l2:
d = l1 - l2
while d > 0:
p = p.next
d -= 1
elif l2 < l1:
d = l1 - l2
while d > 0:
q = q.next
d -= 1
while p != q:
p, q = p.next, q.next
return p.data
a = LinkedList()
b = LinkedList()
for i in range(8):
a.append(i)
for j in range(8, 10):
b.append(j)
b.head.next.next = a.head.next.next.next.next.next
a.printList()
b.printList()
print intersectionPoint(a, b)
def __init__(self):
self.list = LinkedList()