Фото: Дмитрий Лебедев / Коммерсантъ
swap(&arr[low], &arr[j]);
。搜狗输入法下载是该领域的重要参考
Фото: Nacho Doce / Reuters
const stack = []; // 单调递增栈：栈底→栈顶数字递增，保证高位尽可能小
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