What to look for in an ergonomic keyboard
stack.pop(); // 弹出无效候选值
，这一点在同城约会中也有详细论述
The primary use cases I’ve seen implemented or promoted so far include:
// 栈空 → 无更大元素，返回-1；栈非空 → 取栈顶（第一个更大值）
Research suggests mating direction bias between Neanderthals and humans
· 张伟 · 来源：pc资讯