队列与Map综合

def solve(____):
    from collections import deque, defaultdict
    queue = deque()
    count = defaultdict(____)
    for op in operations.split(____):
        parts = op.split(____)
        if parts[____] == '____':
            queue.append(____)
            count[parts[____]] += ____
        elif parts[____] == '____':
            if queue:
                count[queue.popleft()] -= ____
    print(len(____))