# 离线只读验证：不访问网络、不操作设备，只读取同目录合成输入。
import json, math, struct, statistics
from pathlib import Path
def check(d):
 out=[]
 for x in d:
  if not x['maintenance']: out.append('非维护状态')
  elif not x['empty']: out.append('未确认空载')
  elif max(x['samples'])-min(x['samples'])>5: out.append('窗口不稳定')
  else: out.append(f"允许零点{statistics.median(x['samples'])}")
 return out

if __name__=='__main__':
 fixture=json.loads(Path(__file__).with_name('fixture.json').read_text(encoding='utf-8'))
 actual=check(fixture['input'])
 assert actual==fixture['expected'], {'实际':actual,'预期':fixture['expected']}
 print(json.dumps({'状态':'通过','实际':actual,'边界':'仅离线合成样例，现场未测'},ensure_ascii=False))