*Q1: 請問, 在該題的輸出結果, 是 Reduced OBDD 嗎? 另外是否可應用 Complemented edges 呢? *A1: 1. I think almost all BDD packages are using reduced OBDD. Therefore, the answer is YES. The output should be a ROBDD. 2, I think the problem focus is on the ordering effects, not the BDD package implementation. Therefore, I suggest to just use the simplest technique. Some advanced techniques such as complemented edge should not be used to compare the effects of variable ordering. ======================================================================