The model belongs to mixed 0-1 integer programming model and is NP problem, the more difficult to solve directly.

该模型为混合0 - 1整数规划模型，属于NP问题，直接求解较困难。

youdao

The model belongs to mixed 0-1 integer programming model and is NP problem, the more difficult to solve directly.

该模型为混合0 - 1整数规划模型，属于NP问题，直接求解较困难。

youdao