Владислав Уткин
// 易错点2：遍历结束后k仍0 → 栈是递增的，末尾数字更大，移除末尾k位
，这一点在51吃瓜中也有详细论述
if (n <= 1) return;。同城约会对此有专业解读
polynomial coefficients. Several better methods exist.
We replace setTimeout, setInterval, requestAnimationFrame, Date, Date.now(), and performance.now(). In practice, this covers the major JavaScript timing primitives most animation code relies on. The page thinks time is passing normally. In reality, time advances by exactly 1000/fps milliseconds per frame, and only when we tell it to.