MAIN113 - Special String

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A string of letters X, Y, Z is special if there are three consecutive letters from which one is X, one is Y, and one is Z. For example, XYZXYZ is special, while XXYYZ is not. Your task is to calculate how many such strings of length n are not special.


First line contains an integer T(1 <= T <= 30) which denotes the total number of test cases. Each test case contains an integer N(1 <= N <= 30) in a single line.


For each test case print total number of strings which have a length N and are not special.




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Zhiang: 2012-08-17 17:41:18

@admin..plz remove the comment of akuya
its enough to solve the problem

Rajesh Kumar: 2011-11-13 22:15:23

More test cases please...

Gaurav Mittal: 2011-09-21 16:59:16

is xxyz special?

Gunjit : 2011-09-20 09:37:05

plz give sm more test cases...

Rachmawan Atmaji Perdana: 2011-09-04 12:42:44

Integer is not enough

Alex Anderson: 2011-08-25 16:45:23

Why is N limited to 30?

Akshat Aggarwal: 2011-08-25 02:51:13

Last edit: 2011-08-25 08:11:35
Gregorius Edward: 2011-08-24 03:02:44

do xxyz and xyzx are special?

Added by:amit karmakar
Time limit:1s
Source limit:50000B
Memory limit:1536MB
Cluster: Cube (Intel G860)
Languages:All except: ASM64