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:
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Виктория Кондратьева (Редактор отдела «Мир»)
Что думаешь? Оцени!
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[횡설수설/장택동]변시 5번 떨어진 ‘오탈자’ 2000명 시대