// 核心循环：弹出所有≤当前身高的元素 → 这些人都能被当前位置看到（矮个子，无遮挡）
Per-digit arithmetic — computing sum and carry for each pair
，更多细节参见im钱包官方下载
let weights[palette size] = weight for each colour
Since leaving his hometown of Wigan in the north of England aged 19, Dan McKenzie has worked in numerous far-flung places around the world.