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:
Nature, Published online: 25 February 2026; doi:10.1038/d41586-026-00560-6
，这一点在爱思助手下载最新版本中也有详细论述
// ⚠️ 易错点8：长度计算公式写错（比如right-left 或 right-left-1）
Российские ученые разработали способ отслеживать загрязнение водоемов по активности белков в печени рыб. Об этом говорится в статье, опубликованной в журнале Veterinary Sciences.