实现固定窗口限流算法

def solve():
    from pyodide.http import open_url
    from io import StringIO
    request_logs_csv = open_url(____).read()
    rate_limit_config_csv = open_url(____).read()
    import pandas as pd
    from io import StringIO
    logs = pd.read_csv(StringIO(____))
    cfg = pd.read_csv(StringIO(____))
    order_cfg = cfg[cfg['____']=='____'].iloc[____]
    max_req = int(____)
    window = int(____)
    counters = {}
    allowed = denied = ____
    def fixed_window_check(____):
        nonlocal allowed, denied
        win_key = (ip, int(____) // window)
        counters[win_key] = counters.get(____) + ____
        if counters[win_key] <= max_req:
            allowed += ____; return True
        else:
            denied += ____; return False
    order_logs = logs[logs['____']=='____'].sort_values(____)
    for _, row in order_logs.iterrows():
        fixed_window_check(____)
    print(____)
    top_ips = order_logs.groupby(____).size().sort_values(____).head(____)
    print(____)
    for ip, cnt in top_ips.items(): print(____)