胸口：挂饰（全天候记录仪+记忆外挂）；
res[realIdx] = stack.length ? stack.at(-1) : -1;，更多细节参见爱思助手下载最新版本
，这一点在Line官方版本下载中也有详细论述
tempted to start the slice out at a larger size, to avoid all of these
代码要点：倒序遍历，先算右侧再推左侧；栈内维护「右侧候选更大值」，单调递增（栈顶最小）。，更多细节参见Line官方版本下载
The family praised A&E staff at Birmingham Children's Hospital for saving Tilly's life numerous times.