题目描述
Problem Statement
There are N rabbits on a number line.
The rabbits are conveniently numbered 1 through N.
The coordinate of the initial position of rabbit i is x_i.
The rabbits will now take exercise on the number line, by performing sets described below.
A set consists of M jumps. The j-th jump of a set is performed by rabbit a_j (2≤a_j≤N-1).
For this jump, either rabbit a_j-1 or rabbit a_j+1 is chosen with equal probability (let the chosen rabbit be rabbit x), then rabbit a_j will jump to the symmetric point of its current position with respect to rabbit x.
The rabbits will perform K sets in succession.
For each rabbit, find the expected value of the coordinate of its eventual position after K sets are performed.
Input
The input is given from Standard Input in the following format:
N
x_1 x_2 ... x_N
M K
a_1 a_2 ... a_M
Output
Print N lines.
The i-th line should contain the expected value of the coordinate of the eventual position of rabbit i after K sets are performed.
The output is considered correct if the absolute or relative error is at most 10^{-9}.
Constraints
- 3≤N≤10^5
- x_i is an integer.
- |x_i|≤10^9
- 1≤M≤10^5
- 2≤a_j≤N-1
- 1≤K≤10^{18}
Sample Input 1
3
-1 0 2
1 1
2
Sample Output 1
-1.0
1.0
2.0
Rabbit 2 will perform the jump.
If rabbit 1 is chosen, the coordinate of the destination will be -2.
If rabbit 3 is chosen, the coordinate of the destination will be 4.
Thus, the expected value of the coordinate of the eventual position of rabbit 2 is 0.5×(-2)+0.5×4=1.0.
Sample Input 2
3
1 -1 1
2 2
2 2
Sample Output 2
1.0
-1.0
1.0
x_i may not be distinct.
Sample Input 3
5
0 1 3 6 10
3 10
2 3 4
Sample Output 3
0.0
3.0
7.0
8.0
10.0
输入格式
见题面 Input 部分
输出格式
见题面 Output 部分