抢答判定：多人答题的先到锁定

local function answer(actor, ans)
    if ans == "裁决之杖" then
        giveitem(actor, "金元", 100, 0, "答题奖")   -- 同答同奖超发
    end
end

local WINNER = nil
local function answer(actor, ans)
    if WINNER then return end       -- 已锁定，后到仅参与
    if ans == "裁决之杖" then
        WINNER = actor
        giveitem(actor, "金元", 100, 0, "答题冠军")
        sendcentermsg("答题冠军诞生！")
    end
end