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

Collections.deque()

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  • nareshdoddi516
     + 0 comments

    from collections import deque n=int(input()) d=deque() for i in range(n): s=input().split(" ") if s[0]=="append": d.append(int(s[1])) elif s[0]=="appendleft": d.appendleft(int(s[1])) elif s[0]=="clear": d.clear() elif s[0]=="count": d.count(int(s[1])) elif s[0]=="extend": d.extend(int(s[1])) elif s[0]=="extendleft": d.extendleft(int(s[1])) elif s[0]=="pop": d.pop() elif s[0]=="popleft": d.popleft() elif s[0]=="remove": d.remove(int(s[1])) elif s[0]=="reverse": d.reverse() elif s[0]=="rotate": d.rotate(int(s[1])) print(*d)

  • harsh_k_arora
     + 0 comments
    from collections import deque

d = deque()
for _ in range(int(input())):
    func_arg = input().split()
    func = getattr(d, func_arg[0])
    if len(func_arg) == 1:
        func()
    else:
        func(func_arg[1])
print(" ".join(d))

  • samitdebnath435
     + 0 comments

    from collections import deque

    if name == 'main': N = int(input()) d = deque()

    for _ in range(N):

    command = input().split()
    operation = command[0]


    if operation == "append":
        d.append(int(command[1]))
    elif operation == "appendleft":
        d.appendleft(int(command[1]))
    elif operation == "pop":
        d.pop()
    elif operation == "popleft":
        d.popleft()


print(" ".join(map(str, d)))

  • abhishekroy2512
     + 0 comments

    from collections import deque n = int(input()) d = deque() for _ in range(n): x =input().split() m = x[0] try: v= x[1] except Exception as e: pass

    match m:
    case "append":
        d.append(v)
    case "appendleft":
        d.appendleft(v)
    case "pop":
        d.pop()
    case "popleft":
        d.popleft()
    case _:
        print(-1)

    #

    print(*d)

  • rishabhkumar9167
     + 0 comments

    from collections import deque

    d=deque([]) n=int(input()) for _ in range(n): method,*args=input().split() if args: getattr(d,method)(*map(int,args)) else: getattr(d,method)() print(*d)