Some questions for the code

[Junge Zhang]

So appreciative of you to provide the code for your algorithm. There are some questions for me when following your algorithm.

1. The area and delay variables seem not to get connected correctly with the variables b. https://github.com/SJTU-ECTL/GOMIL/blob/master/src/Adder_Tree_Optimization.cpp#L131 conflicts with the formulation in the paper. If this happens, the adder and multiplication will be divided separately, which leads to an unexpected solution.

2. Some wrong parameters settings.

(1) The https://github.com/SJTU-ECTL/GOMIL/blob/master/src/main.cpp#L129 and https://github.com/SJTU-ECTL/GOMIL/blob/master/src/main.cpp#L91 take different proportion for full adders and half adders.

(2) The default settings of parameter W and L differ with the settings in the paper.