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EIUPOLY - Polynomial

Give polynomial P(x)=anxn+ an-1xn-1+ ... + a1x+ a0  and the value of x, find the value of the polynomial.

Input

+ The first line contains the number of testcases T (1<= T <=10^3).  Each testcase includes:

+ The value of n và x. (n < 100, x < 1000).

+ The coefficients: an, an-1,... a0 (-1000 <= ai <= 1000).

Output

For each test case, output the value of the polynomial on one row.

Example

Input:
1
2 1
1 2 1
Output:
4

Added by:Ha Minh Ngoc
Date:2014-12-15
Time limit:1s
Source limit:50000B
Memory limit:1536MB
Cluster: Cube (Intel G860)
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