Медведев вышел в финал турнира в Дубае17:59
"A wave came up the street and knocked me off the step, I was carried across the road, over to the wall, but I was able to kick off and get back," he said.
，详情可参考同城约会
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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DB = "spider.db"