九度-1337-寻找最长合法括号序列[数据结构] | Acm之家



九度-1337-寻找最长合法括号序列[数据结构] | Acm之家

给你一个长度为N的,由'('和')'组成的括号序列,你能找出这个序列中最长的合法括号子序列么?合法括号序列的含义便是,在这个序列中,所有的左括号都有唯一的右括号匹配;所有的右括号都有唯一的左括号匹配。例如:((()))()()便是一个长度为10的合法括号序列,而(()))( 则不是。
需要你求解的是,找出最长的合法括号子序列的长度,同时找出具有这样长度的序列个数。
输入:
测试数据包括多个,每个测试数据包含两行:
第一行为一个整数N,其中N不会超过10^6。
第二行为一个长度为N的字符串,这个字符串由左括号'('和右括号')'组成。
输出:
对应每个测试案例,输出一行,其中包含两个整数,分别代表最长合法括号序列的长度和个数,中间由空格隔开。若没有合法的子序列存在,则返回0 1。

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