Circle

Accepts: 62
Submissions: 478
Time Limit: 2000/1000 MS (Java/Others)
Memory Limit: 65536/65536 K (Java/Others)
Problem Description
$\ \ \ \ $Satiya August is in charge of souls. $\ \ \ \ $He finds $n$ souls,and lets them become a circle.He ordered them to play Joseph Games.The souls will count off from the soul $1$.The soul who is numbered $k$ will be taken out,and will not join in the game again. $\ \ \ \ $Now Satiya August has got the sequence in the Out Ordered,and ask you the smallest $k$.If you cannot give him a correct answer,he will kill you!
Input
$\ \ \ \ $The first line has a number T,means testcase number. $\ \ \ \ $Each test,first line has a number $n$. $\ \ \ \ $The second line has $n$ numbers,which are the sequence in the Out Ordered**(The person who is out at $ai_{th}$ round was numbered $i$)**. $\ \ \ \ $The sequence input must be a permutation from $1$ to $n$. $\ \ \ \ 1\le T \le 10,2 \le n \le 20$.
Output
$\ \ \ \ $For each case,If there is a eligible number $k$,output the smallest $k$,otherwise,output¡±Creation August is a SB!¡±.
Sample Input
1
7
7 6 5 4 3 2 1
Sample Output
420