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

Collections.deque()

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  • piras_2019843
     + 0 comments

    from collections import deque

    N= int(input()) d=deque()

    for _ in range(N): cmd,*args = input().split() getattr(d, cmd)(*map(int, args))

    print(*d)

  • howard_lockward
     + 0 comments
    from collections import deque

if __name__ == '__main__':
    N = int(input())
    d = deque()

    funcs = {
        'append': lambda x: d.append(x),
        'appendleft': lambda x: d.appendleft(x),
        'clear': lambda: d.clear(),
        'count': lambda x: d.count(x),
        'extend': lambda x: d.extend(x),
        'extendleft': lambda x: d.extendleft(x),
        'pop': lambda: d.pop(),
        'popleft': lambda: d.popleft(),
        'remove': lambda x: d.remove(x),
        'reverse': lambda: d.reverse()
    }

    inputs = [input().split() for _ in range(N)]
    for command in inputs:
        funcs[command[0]](*[int(x) for x in command[1:]])

    print(*d)

  • dheenupriya2001
     + 0 comments
    from collections import deque

d = deque()
n = int(input())
for _ in range(n):
    string = input().split(' ')
    if string[0] == "append":
        d.append(string[1])
    elif string[0] == "appendleft":
        d.appendleft(string[1])
    elif string[0] == "pop":
        d.pop()
    else:
        d.popleft()
print(*d, end=" ")

  • 191FA07033
     + 0 comments
    from collections import deque
n=int(input())
d=deque()
for _ in range(n):
    y=input().split()
    if(y[0]=="append"):
        d.append(y[1])
    elif(y[0]=="appendleft"):
        d.appendleft(y[1])
    elif(y[0]=="pop"):
        d.pop()
    elif(y[0]=="popleft"):
        d.popleft()
print(*d,end=" ")

  • PortalPirate
     + 0 comments
    from collections import deque
d=deque()
for _ in range(int(input())):
    n=input().split()
    if n[0]=="append":
        d.append(int(n[-1]))
    elif n[0]=="appendleft":
        d.appendleft(int(n[-1]))
    elif n[0]=="pop":
        d.pop()
    elif n[0]=="popleft":
        d.popleft()
print(" ".join(map(str, list(d))))