方向遍历顺序说明下一个倒序（从右往左）先处理右侧，栈里存「右侧候选」上一个正序（从左往右）先处理左侧，栈里存「左侧候选」
Сайт Роскомнадзора атаковали18:00
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14:21: Video evidence obtained by the BBC shows police firing at protesters from inside the parliamentary complex. We have been able to establish that police fired seven shots at the crowd.，推荐阅读同城约会获取更多信息
Мощный удар Израиля по Ирану попал на видео09:41
It reads like a lovely every day tale, not a fairy tale: no glass slippers, but wellies.