Deque usage — front/back patterns

Window rotate, monotone candidates, cards — இரு முனை.

Try this in Python

from collections import deque

d = deque(range(5))
d.rotate(2)
print(list(d))
while d:
    print(d.popleft() if len(d) % 2 else d.pop(), end=" ")
print()

Key takeaways

• rotate சிறிய k-க்கு.
• Alternating pops — flow practice.
• பெரிய rotation — indices.