Competitions

# Parent

Write a program that determines for two nodes of a tree whether the first one is a parent of another.

#### Input

The first line contains the number of vertices n (1n105) in a tree. The second line contains n numbers, the i-th one gives the vertex number of direct ancestor for the vertex i. If this value is zero, then the vertex is a root of a tree.

The third line contains the number of queries m (1m105). Each of the next m lines contains two different numbers a and b (1a, bn).

#### Output

For each of the m queries print on a separate line number 1, if the vertex a is one of the parents of a vertex b, and 0 otherwise.

Time limit 1 second
Memory limit 256 MiB
Input example #1
6
0 1 1 2 3 3
5
4 1
1 4
3 6
2 6
6 5

Output example #1
0
1
1
0
0

Author Vitaly Goldstein
Source Winter School, Kharkov, 2011, Day 9