# 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):
 assert d['on']>d['off']
 state=False; vals=[]; edges=0
 for v in d['values']:
  old=state
  if not state and v>=d['on']: state=True
  elif state and v<=d['off']: state=False
  edges+=state!=old; vals.append(state)
 return dict(states=vals,edges=edges)

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))