重点领域突破，发展动能全面提升
Credit: Casetify
。关于这个话题，51吃瓜提供了深入分析
What is this page?。业内人士推荐safew官方下载作为进阶阅读
There is a special form for boolean formulas called "Conjunctive Normal Form" (CNF). A problem in this form consists of clauses connected with and operators, where each clause only contains variables connected with or operators. The variables can appear negated, but only variables can be directly negated, something like !(a && b) is not allowed. An example boolean formula in CNF form is: