杂货店尽可能让结账台有足够的员工,以便所有顾客结账时耽误的时间最少。
Grocery stores try to have enough employees at checkout to get all their customers through with minimum delay.
必须选择枢轴行,以便所有其他基本变量保持正数。
The pivot row must be selected so that all the other basic variables remain positive.
重要的是,记住不成为下一个小便所的人的镜像是ok的。
The important thing to remember is that it's OK to not be a mirror image of the guy at the next urinal.
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