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中级

验证上报时间戳合法性（时钟漂移）

未完成
中级参考 代码结构已给出，请填写 ____ 处 
def solve():
    from pyodide.http import open_url
    from io import StringIO
    import pandas as pd, json
    payloads_csv = open_url(____).read()
    payloads = pd.read_csv(StringIO(____))
    MAX_DRIFT = ____
    def check_clock_drift(____):
        try: p = json.loads(____)
        except: return False, '____', ____
        ts = p.get('____', p.get(____))
        if ts is None: return False, '____', ____
        drift = abs(float(____) - float(____))
        if drift > MAX_DRIFT: return False, '____', drift
        return True, '____', drift
    for _, row in payloads.head(____).iterrows():
        ok, reason, drift = check_clock_drift(____)
        status = "____" + str(round(____)) + "____" if ok else "____" + reason + "____" + str(round(____)) + "____"
        print("____" + str(____) + "____" + row['____'] + "____" + status)

示例

输入
solve()
期望输出
id=1 RPI-001: OK drift=0.1s
id=2 ARD-001: OK drift=0.2s
id=3 ESP-001: REJECT(invalid_json drift=0s)
id=4 GW-001: REJECT(missing_timestamp drift=0s)
id=5 ESP-001: REJECT(invalid_json drift=0s)
id=6 RPI-002: REJECT(missing_timestamp drift=0s)
id=7 ARD-002: OK drift=0.0s
id=8 RPI-001: OK drift=20.0s
id=9 ARD-999: OK drift=0.0s
id=10 ARD-001: OK drift=0.0s
id=11 ARD-002: OK drift=0.0s
id=12 RPI-003: OK drift=0.0s
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