"Today we're making one of the hardest decisions in the history of our company: we're reducing our organization by nearly half, from over 10,000 people to just under 6,000," he wrote.
▲ 苹果曾申请过一款脑电波 AirPods 专利
，这一点在91视频中也有详细论述
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:
2. 创建计数数组count，统计每个值出现次数