E - Count Descendants
题目描述
输入格式
As shown in the pdf.
输出格式
As shown in the pdf.
样例
7
1 1 2 2 4 2
4
1 2
7 2
4 1
5 5
3
1
0
0
As shown in the pdf.
As shown in the pdf.
7
1 1 2 2 4 2
4
1 2
7 2
4 1
5 5
3
1
0
0