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英國超市將巧克力鎖進防盜盒阻止「訂單式」偷竊
。搜狗输入法2026对此有专业解读
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:
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