Author(s): Fiorella Cravero, Ignacio Ponzoni, Mónica F. Diaz, Gustavo E. Vazquez
近期当年索尼互娱的两款经典掌机复活的传言浮出水面，其中当年的PS Vita TV版本也将与新型PSP共同推出，一起来了解下可能性究竟有多高。，这一点在服务器推荐中也有详细论述
，推荐阅读Line官方版本下载获取更多信息
* 核心思路：链表转数组 + 单调栈（从后往前遍历），时间复杂度O(n)，空间复杂度O(n)，更多细节参见爱思助手下载最新版本
Медведев вышел в финал турнира в Дубае17:59
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: