中途重开的一次对话

（每道题开头都有同一段游戏核心：new_round 开一局、parse 校验输入、judge 比大小、step 记一次猜测、score 算分。秘密固定是 73。）

session 管一整次运行：处理 q、r、非法、结束后再猜。秘密依次 73、18。看这串输入的回应和记录：

LIMIT = 7

def new_round(secret):
    return {"secret": secret, "tries": 0, "low": 1, "high": 100, "over": False, "won": False}

def parse(line):
    s = line.strip()
    if s in ("q", "r"):
        return s
    if not s.isdigit():
        return None
    n = int(s)
    if n < 1 or n > 100:
        return None
    return n

def judge(secret, n):
    if n > secret:
        return "大了"
    if n < secret:
        return "小了"
    return "对了"

def step(st, n):
    st["tries"] += 1
    r = judge(st["secret"], n)
    if r == "大了" and n - 1 < st["high"]:
        st["high"] = n - 1
    if r == "小了" and n + 1 > st["low"]:
        st["low"] = n + 1
    if r == "对了":
        st["won"] = True
    if st["won"] or st["tries"] >= LIMIT:
        st["over"] = True
    return r

def score(st):
    return LIMIT + 1 - st["tries"] if st["won"] else 0

def play(secret, lines):
    st = new_round(secret)
    out = []
    for line in lines:
        if st["over"]:
            break
        n = parse(line)
        if n is None:
            out.append("无效")
            continue
        if n == "q":
            out.append("退出")
            break
        out.append(step(st, n))
    return st, out

def record(rec, st):
    rec["rounds"] += 1
    if st["won"]:
        rec["wins"] += 1
    s = score(st)
    rec["total"] += s
    if s > rec["best"]:
        rec["best"] = s
    return s

def session(secrets, lines):
    rec = {"rounds": 0, "wins": 0, "total": 0, "best": 0}
    k = 0
    st = new_round(secrets[0])
    out = []
    for line in lines:
        n = parse(line)
        if n is None:
            out.append("无效")
            continue
        if n == "q":
            out.append("退出")
            break
        if n == "r":
            k = (k + 1) % len(secrets)
            st = new_round(secrets[k])
            out.append("重开")
            continue
        if st["over"]:
            out.append("本局已结束")
            continue
        out.append(step(st, n))
        if st["over"]:
            record(rec, st)
    return rec, out

SECRETS = [73, 18]
LINES = ["50", "r", "50", "25", "12", "18", "q"]
rec, out = session(SECRETS, LINES)
print(",".join(out) + "/" + str(rec["rounds"]) + "/" + str(rec["total"]))