This very simple program declares the two decision variables: the constraint and the objective function.
这个非常简单的程序声明了两个决策变量：约束和目标函数。
Line 20 declares the objective (target) function as the maximization of z, which is the total profit for every kind of toy (there are two: trains and soldiers).
第20行声明了对象函数是z的最大值，这是每种玩具的总体收益(一共有两种玩具：火车和士兵)。
As compared with the corresponding results in the linear bilevel programs, our generalizations are two-fold: the objective function and the condition that should be satisfied.
与线性双层规划的有关结果相比较，该文在目标函数和所要求满足的条件两方面都有推广。
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