英语翻译

题目

英语翻译
Let S = s1 s2...s2n be a well-formed string of parentheses.S can be encoded in two different ways:
q By an integer sequence P = p1 p2...pn where pi is the number of left parentheses before the ith right parenthesis in S (P-sequence).
q By an integer sequence W = w1 w2...wn where for each right parenthesis,say a in S,we associate an integer which is the number of right parentheses counting from the matched left parenthesis of a up to a.(W-sequence).
Following is an example of the above encodings:
S (((()()())))
P-sequence 4 5 6666
W-sequence 1 1 1456
请把意思说清楚~
不要谷歌在线翻译的东西~

答案

s是一组括弧.有两种编码方法.方法一,可获得数列P.其中每个Pi是指在第i个右括弧左边的左括弧数目.(((()比如以上在第一个右括弧左边有4个左括弧.所以P1是4,p2是5...方法二,可获得数列W.把这堆括弧左右一一对应起来.Wi...