Description
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 1456Write a program to convert P-sequence of a well-formed string to the W-sequence of the same string.
Input
The first line of the input contains a single integer t (1 <= t <= 10), the number of test cases, followed by the input data for each test case. The first line of each test case is an integer n (1 <= n <= 20), and the second line is the P-sequence of a well-formed string. It contains n positive integers, separated with blanks, representing the P-sequence.
Output
The output file consists of exactly t lines corresponding to test cases. For each test case, the output line should contain n integers describing the W-sequence of the string corresponding to its given P-sequence.
Sample Input
264 5 6 6 6 69 4 6 6 6 6 8 9 9 9
Sample Output
1 1 1 4 5 61 1 2 4 5 1 1 3 9
Source
题目大意:一组标准的括号(就是每一个左括号的都有且仅有一个右边的对应,符合常理),其编码方式有两种:
P:p[i]表示第i个右括号左边有的左括号数量
W:w[i]表示从与第i个右括号对应的左括号开始至第i个右括号共有右括号的数量
现在给出P串输出W串
解题思路:用b[]统计第i个右括号和第i-1个右括号之间有多少个左括号,然后模拟流程(对于每个右括号向前找
最近左括号,然后在找到的左括号对应区间的b[]减1,依次寻找....
1 #include2 #include 3 #include 4 using namespace std; 5 int main(){ 6 int n,a[25],b[25]; 7 int t;cin>>t; 8 while(t--){ 9 cin>>n; //输入10 for(int i=0;i >a[i];12 b[0]=a[0]; //求b[]13 for(int i=1;i =0;j--){18 if(b[j]!=0){19 cout<<' '<