Git-Mirrors/master-algorithms-py
1
0
Fork 0
mirror of https://github.com/autistic-symposium/master-algorithms-py.git synced 2025-04-29 20:26:07 -04:00
Code Issues Packages Projects Releases Wiki Activity

Update README.md

Browse Source
This commit is contained in:
marina 2023-08-07 18:07:20 -07:00 committed by GitHub
parent 18c33edfb0
commit f895ac1da8
No known key found for this signature in database
GPG Key ID: 4AEE18F83AFDEB23
1 changed files with 31 additions and 30 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

57
queues/README.md
View File

@ -112,55 +112,56 @@ class CircularQueue:
<br>
```python
class Node:
def __init__(self, value, next=None):
self.value = value
self.next = next
class CircularQueue:
def __init__(self, k: int):
self.head = -1
self.tail = -1
self.size = k
self.queue = [None] * self.size
def _get_next_position(self, end) -> int:
return (end + 1) % self.size
self.capacity = k
self.count = 0
self.head = None
self.tail = None
def enqueue(self, value: int) -> bool:
if self.is_full():
if self.count == self.capacity:
return False
if self.is_empty() :
self.head = 0;
self.tail = self._get_next_position(self.tail)
self.queue[self.tail] = value
if self.count == 0:
self.head = Node(value)
self.tail = self.head
else:
new_node = Node(value)
self.tail.next = new_node
self.tail = new_node
self.count += 1
return True
def dequeue(self) -> bool:
if self.is_empty():
if self.count == 0:
return False
if self.head == self.tail:
self.head = -1
self.tail = -1
return True
self.head = self._get_next_position(self.head)
self.head = self.head.next
self.count -= 1
return True
def front(self) -> int:
if self.is_empty():
if self.count == 0:
return -1
return self.queue[self.head]
return self.head.value
def rear(self) -> int:
if self.is_empty():
if self.count == 0:
return -1
return self.queue[self.tail]
return self.tail.value
def is_empty(self) -> bool:
return self.head == -1
return self.count == 0
def is_full(self) -> bool:
return self._get_next_position(self.tail) == self.head
return self.count == self.capacity
```