伟大梦想的实现是一场永不停歇的接力跑，既需要自身本领高强，也需要时时加油补给，更需要大家勠力同心。从一个个温暖片段里读懂深沉期盼、汲取奋斗力量、校准前进航线，我们一定能齐心共进，抵达梦想彼岸。
Less Than (2): Everything in this space must be less than 2. The answer is 0-0, placed vertically.，详情可参考WPS官方版本下载
// 从右找第一个小于pivot的，推荐阅读夫子获取更多信息
If the A* calculation for a shortcut (in Step 3) finds it's now impassable, or if its actual detailed cost is significantly different (e.g., 20%) from the pre-calculated shortcut value: