请高手指教，这题是什么意思，怎么解?拜谢！！
Suppose U is set of objects, E is a set of {0,1}-valued parametersfor describing objects in U. For any u in U, define an additive utility
function f as follows:
f (u ) e （u ）, （对e属于E，e(u)求和）
e E
where e(u ) 0,1. u is called an optimal solution if it is one of the
maximum points of function f with respect to normal order. For
certain reasons, some values are missing. It costs if we want to find
out what these values are. We assume that we know nothing about
the probability of these values being 0 or 1. So my questions are:
(1.) Which unknown value should we figure out firstly if we want to
find at least one optimal solution? 大家帮帮忙啊！！急用啊！告诉我这题的出处也行啊！ 用有道翻译哈！ 不是，我翻译过了，没有思路！
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