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Create Deque.py #13419

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18 changes: 18 additions & 0 deletions data_structures/arrays/Deque.py
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Original file line number Diff line number Diff line change
@@ -0,0 +1,18 @@
# Find maximum of every window of size k

Check failure on line 1 in data_structures/arrays/Deque.py

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Ruff (N999) 

data_structures/arrays/Deque.py:1:1: N999 Invalid module name: 'Deque'
from collections import deque

arr = [1,3,-1,-3,5,3,6,7]
k = 3
dq = deque()
res = []

for i, val in enumerate(arr):
while dq and dq[0] <= i-k:
dq.popleft() # remove out-of-window indices
while dq and arr[dq[-1]] < val:
dq.pop() # remove smaller elements
dq.append(i)
if i >= k-1:
res.append(arr[dq[0]])

print(res) # [3, 3, 5, 5, 6, 7]
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