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  1. Prepare
  2. Python
  3. Collections
  4. Collections.deque()
  5. Discussions

Collections.deque()

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633 Discussions

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  • adrien_cordonni1
     + 0 comments

    The shortest code I could come with. I wonder if it could be shorter.

    from collections import deque

d = deque()
for _ in range(int(input())):
    cmd, *attribute = input().split()
    eval(f'd.{cmd}({(attribute[0:1] or ('',))[0]})')
print(*d)

  • syahrulmahar92
     + 0 comments

    from collections import deque n = int(input()) d = deque() for i in range(n): val = input().split() if val[0] == 'append': d.append(int(val[1])) elif val[0] == 'pop': d.pop() elif val[0] == 'popleft': d.popleft() elif val[0] == 'appendleft': d.appendleft(int(val[1])) for i in d: print(i, end=' ')

  • sefamutlucu
     + 0 comments
    from collections import deque

d = deque()

n = int(input())

for i in range(n):
    command, *number = input().split()
    
    if number:
        number = int(number[0])
        getattr(d, command)(number)
    
    else:
        getattr(d, command)()
        
print(*d)

  • imam_alfaridzi
     + 0 comments

    Here's my code:

    from collections import deque
res = deque()
for i in range(int(input())):
    u = input().split()
    if not hasattr(res, u[0]):
        continue
    val = u[1] if len(u) > 1 else None
    if val:
        getattr(res, u[0])(val)
    else:
        getattr(res, u[0])()
print(*res)

  • kcmutya
     + 0 comments
    # Enter your code here. Read input from STDIN. Print output to STDOUT
from collections import deque

n = int(input())
empty_queue = deque()

for i in range(n):
    m = input().split()

    if m[0] == 'append':
        empty_queue.append(m[1])
    if m[0] == 'pop':
        empty_queue.pop()
    if m[0] == 'appendleft':
        empty_queue.appendleft(m[1])
    if m[0] == 'popleft':
        empty_queue.popleft()

print(*empty_queue)