"""荒謬商品拍賣會：使用虛擬幣，所有資料只留在本次執行。"""

PRODUCT = "永遠慢一天的作業提醒手錶"
BUDGET = 100
START = 10
STEP = 5
PLAYERS = ["甲", "乙", "丙"]


def ask_bid(name, minimum):
    if minimum > BUDGET:
        return 0
    while True:
        raw = input(f"{name}，出價 {minimum}～{BUDGET} 幣，0 放棄：").strip()
        try:
            bid = int(raw)
        except ValueError:
            print("請輸入整數。")
            continue
        if bid == 0 or minimum <= bid <= BUDGET:
            return bid
        print(f"出價需在 {minimum}～{BUDGET} 幣之間。")


def open_round(players):
    """每次新出價都公開；全員一整輪沒有加價即開標。"""
    winner, price = "", 0
    while True:
        changed = False
        for name in players:
            if name == winner:
                continue
            minimum = price + STEP if winner else START
            bid = ask_bid(name, minimum)
            if bid:
                winner, price, changed = name, bid, True
                print(f"目前最高：{winner}｜{price} 幣")
        if not changed or price >= BUDGET:
            return winner, price


def announce(result):
    winner, price = result
    if not winner:
        print("流標：沒有符合條件的出價。")
        return
    print(f"{winner} 得標｜成交 {price} 幣｜剩餘 {BUDGET - price} 幣")


def main():
    if not 1 <= START <= BUDGET or STEP < 1:
        print("請設定 1 ≤ 起標價 ≤ 預算，最低加價至少 1 幣。")
        return
    print(f"\n荒謬商品拍賣會｜{PRODUCT}")
    print(f"每人 {BUDGET} 枚虛擬幣｜起標 {START}｜公開加價至少 {STEP} 幣")
    print("輸入 0 代表這次不加價；一整輪沒人加價即開標。")
    announce(open_round(PLAYERS))


if __name__ == "__main__":
    main()