第十二条 居民委员会具有基层群众性自治组织法人资格，居民委员会主任为法定代表人。居民委员会可以从事为履行职能所需要的民事活动，但是不得提供担保。
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This challenge explores a fundamental question: what is the minimal transformer that can represent integer addition?
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: