May 12, 2022 · May 12, 2022
diff --git a/README.md b/README.md
 2
 4
 '''

 # To fetch last n values only

 last_5 = deque(maxlen=5)

 for i in range(1, 10+1):
    last_5.append(i)

 '''
 deque([6, 7, 8, 9, 10], maxlen=5)
 6
 7
 8
 9
 10
 '''

 # To rotate n times or -n times

 country = deque(list("America"))

 country.rotate(2)
 print(country)
 country.rotate(-3)
 print(country)

 '''
 deque(['c', 'a', 'A', 'm', 'e', 'r', 'i'])
 c
 a
 A
 m
 e
 r
 i

 deque(['m', 'e', 'r', 'i', 'c', 'a', 'A'])
 m
 e
 r
 i
 c
 a
 A
 '''


 ```

 ## Queue
 graph[1].append(2) # 1 -> 2
 graph[2].append(3) # 1 -> 2 -> 3
 graph[4].append(1) # 4 -> 1 -> 2 -> 3


 visited = set()

 def dfs(node, graph, visited):
 def dfs(node, graph, visited=set()):
  if node not in visited:
      print(node)
      visited.add(node)
Original file line number	Diff line number	Diff line change
Expand Up		@@ -315,6 +315,53 @@ deque([4, 3, 1, 2])
		2
		4
		'''

		# To fetch last n values only

		last_5 = deque(maxlen=5)

		for i in range(1, 10+1):
		last_5.append(i)

		'''
		deque([6, 7, 8, 9, 10], maxlen=5)
		6
		7
		8
		9
		10
		'''

		# To rotate n times or -n times

		country = deque(list("America"))

		country.rotate(2)
		print(country)
		country.rotate(-3)
		print(country)

		'''
		deque(['c', 'a', 'A', 'm', 'e', 'r', 'i'])
		c
		a
		A
		m
		e
		r
		i

		deque(['m', 'e', 'r', 'i', 'c', 'a', 'A'])
		m
		e
		r
		i
		c
		a
		A
		'''


		```

		## Queue
Expand DownExpand Up		@@ -662,10 +709,9 @@ graph = defaultdict(list)
		graph[1].append(2) # 1 -> 2
		graph[2].append(3) # 1 -> 2 -> 3
		graph[4].append(1) # 4 -> 1 -> 2 -> 3


		visited = set()

		def dfs(node, graph, visited):
		def dfs(node, graph, visited=set()):
		if node not in visited:
		print(node)
		visited.add(node)
Expand Down