And so you could construct all subsets, check that the weight is less than the weight of the knapsack, and then choose the subset with the maximum value.

因此你可以构建所有子问题，判断它的重量,是否小于背包的重量，然后选择值最大的子问题。

麻省理工公开课 - 计算机科学及编程导论课程节选

And people are making errors of this magnitude you can see the problem.

如果人们在重量估测上犯了错,问题便出现了

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So how would we go about solving this problem if I told you not only was there a maximum weight, but there was a maximum volume. Well, we want to go back and attack it exactly the way we attacked it the first time, which was write some mathematical formulas.

有些时候两个都重要,所以如果我告诉你这里不仅有,最大重量还有最大容量，我们应该怎么解决这个问题呢？,好了，我们想回过来然后,和第一次一样看看这个问题。

麻省理工公开课 - 计算机科学及编程导论课程节选