Медведев вышел в финал турнира в Дубае17:59
Шанхайские Драконы
，更多细节参见Line官方版本下载
I found one dumb free win (I mistakenly used value receivers on a utility function called on a large struct thousands of times a frame). But the rest of the speedups I found took more effort.
int pivotIdx = partition(arr, low, high); // 分区并获取pivot位置