def sum_lists(list1, list2):
size_list1 = list1.size()
size_list2 = list2.size()
diff = size_list1 - size_list2
if diff > 0:
fill(list2, diff)
elif diff < 0:
fill(list1, diff)
list1.insertToHead(0)
list2.insertToHead(0)
result = LinkedList()
result.insert(0)
node1 = list1.head
node2 = list2.head
node_res = result.head
cal_sum_list(node1, node2, node_res)
if result.head.data == 0:
result.head = result.head.next
return result
def sum_lists(head1, head2):
node1 = head1
node2 = head2
result = LinkedList()
result.insert(0)
node_res = result.head
while node1 and node2 and node_res:
res = node1.data + node2.data + node_res.data
carry_in = res % 10
carry_out = int(res / 10)
node_res.data = carry_in
new_node = Node(carry_out)
node_res.next = new_node
node1 = node1.next
node2 = node2.next
node_res = node_res.next
if node1:
sum_with_one_list(node1, node_res)
elif node2:
sum_with_one_list(node2, node_res)
return remove_last_zero(result.head)
def __init__(self,
cats_queue=LinkedList(),
dogs_queue=LinkedList(),
last_order=0):
self.cats_queue = cats_queue
self.dogs_queue = dogs_queue
self.last_order = last_order
def tests():
ll = LinkedList()
ll.insert(4)
ll.insert(3)
ll.insert(2)
ll.insert(5)
ll.insert(2)
ll.insert(4)
assert ll.prettify() == [(4, 3), (3, 2), (2, 5), (5, 2), (2, 4), (4, None)]
remove_dups(ll)
assert ll.prettify() == [(4, 3), (3, 2), (2, 5), (5, None)]
def tests(): ll = LinkedList() ll.insert(4) ll.insert(3) ll.insert(2) ll.insert(5) ll.insert(2) ll.insert(4) assert ll.prettify() == [(4, 3), (3, 2), (2, 5), (5, 2), (2, 4), (4, None)] assert returnKthToLast(ll, 0).data == 4 assert returnKthToLast(ll, 2).data == 5 assert returnKthToLast(ll, 5).data == 4
def tests():
l1 = LinkedList()
l1.insert('A')
l1.insert('B')
l1.insert('C')
l1.insert('D')
l1.insertNode(Node('E', l1.head.next.next))
assert loop_detection(l1).data == 'C'
def bst_sequences(root):
results = []
if not root:
return results
prefix = LinkedList()
prefix.insert(root.value)
left_sequence = bst_sequences(root.left)
right_sequence = bst_sequences(root.right)
for left in left_sequence:
for right in right_sequence:
res = []
combine_lists(left, right, res, prefix)
results.extend(res)
return results
def partition(linkedlist, partition):
partitioned_linked_list = LinkedList()
node = linkedlist.head
while node != None:
if node.data < partition:
partitioned_linked_list.insertToHead(node.data)
else:
partitioned_linked_list.insert(node.data)
node = node.next
return partitioned_linked_list
def is_palindrome(l):
middle = l.size() / 2
count = 0
node = l.head
inverted_list = LinkedList()
while node:
count += 1
if count == middle:
inverted_list = create_inverted_list(node)
node = node.next
node1 = l.head
node2 = inverted_list.head
while node1 and node2:
if node1.data != node2.data:
return False
node1 = node1.next
node2 = node2.next
return True
def tests(): l1 = LinkedList() l1.insert(7) l1.insert(1) l1.insert(6) l2 = LinkedList() l2.insert(5) l2.insert(9) l2.insert(2) l3 = LinkedList() l3.head = sum_lists(l1.head, l2.head) assert l3.prettify() == [(2, 1), (1, 9), (9, None)]
def tests():
ll = LinkedList()
ll.insert(3)
ll.insert(5)
ll.insert(8)
ll.insert(5)
ll.insert(10)
ll.insert(2)
ll.insert(1)
ll.head = partition(ll, 5)
assert ll.prettify() == [(1, 2), (2, 3), (3, 5), (5, 8), (8, 5), (5, 10),
(10, None)]
def tests():
l1 = LinkedList()
l1.insert(2)
l1.insert(3)
l1.insert(4)
l1.insert(5)
l1.insert(7)
l2 = LinkedList()
l2.insert(5)
l2.insert(6)
l2.insert(7)
l2.insert(4)
l2.insert(5)
l2.insert(7)
assert intersection(l1, l2).data == 4
def tests():
l1 = LinkedList()
l1.insert('A')
l1.insert('N')
l1.insert('A')
l2 = LinkedList()
l2.insert('A')
l2.insert('N')
l2.insert('T')
l2.insert('A')
assert is_palindrome_2(l1) == True
assert is_palindrome(l2) == False
def tests(): linked_list = LinkedList() linked_list.insert(3) linked_list.insert(5) linked_list.insert(8) linked_list.insert(5) linked_list.insert(10) linked_list.insert(2) linked_list.insert(1) expected_output = LinkedList() expected_output.insert(1) expected_output.insert(2) expected_output.insert(3) expected_output.insert(5) expected_output.insert(8) expected_output.insert(5) expected_output.insert(10) assert expected_output.prettify() == partition(linked_list, 5).prettify()
def tests():
l1 = LinkedList()
l1.insert(6)
l1.insert(1)
l1.insert(7)
l2 = LinkedList()
l2.insert(2)
l2.insert(9)
l2.insert(5)
l3 = sum_lists(l1, l2)
print(l3.prettify())
def tests():
l1 = LinkedList()
l1.insert('A')
l1.insert('N')
l1.insert('A')
l2 = LinkedList()
l2.insert('A')
l2.insert('N')
l2.insert('T')
l2.insert('A')
def list_of_depths(root):
array = []
linked_list = LinkedList()
if root.value:
linked_list.insert(root) # Visiting the root
while linked_list.size() > 0:
array.append(
linked_list) # Adding the level to the array of linkedLists
parents = linked_list # Storing the previous level
linked_list = LinkedList() # Reseting the linkedList of current level
parent = parents.head
while parent:
p = parent.data
if p.left and p.left.value:
linked_list.insert(p.left)
if p.right and p.right.value:
linked_list.insert(p.right)
parent = parent.next
return array
def create_inverted_list(node):
list = LinkedList()
while node:
list.insertToHead(node)
node = node.next
return list