对阵表：联赛赛程的自动编排

local ROUNDS = {
    {"A队", "B队"}, {"C队", "D队"},   -- 手写排表，错3场
}

local function roundPair(teams)
    local sorted = {unpack(teams)}
    table.sort(sorted, function(a, b)
        return a.score > b.score end)
    local out = {}
    for i = 1, #sorted - 1, 2 do
        out[#out + 1] = {sorted[i], sorted[i + 1]}
    end
    if #sorted % 2 == 1 then
        out[#out + 1] = {sorted[#sorted], "轮空"}
    end                              -- 首尾配对，奇数自动轮空
    return out
end