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GNY07H - Tiling a Grid With Dominoes |
We wish to tile a grid 4 units high and N units long with rectangles (dominoes) 2 units by one unit (in either orientation). For example, the figure shows the five different ways that a grid 4 units high and 2 units wide may be tiled.
Write a program that takes as input the width, W, of the grid and outputs the number of different ways to tile a 4-by-W grid.
Input
The first line of input contains a single integer N, (1 ≤ N ≤ 1000) which is the number of datasets that follow.
Each dataset contains a single decimal integer, the width, W, of the grid for this problem instance.
Output
For each problem instance, there is one line of output: The problem instance number as a decimal integer (start counting at one), a single space and the number of tilings of a 4-by-W grid. The values of W will be chosen so the count will fit in a 32-bit integer.
Example
Input: 3 2 3 7 Output: 1 5 2 11 3 781
Added by: | Marco Gallotta |
Date: | 2008-03-12 |
Time limit: | 9.600s |
Source limit: | 50000B |
Memory limit: | 1536MB |
Cluster: | Cube (Intel G860) |
Languages: | All except: ERL JS-RHINO NODEJS PERL6 VB.NET |
Resource: | ACM Greater New York Regionals 2007 |
hide comments
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2018-08-05 13:42:00
Before solving this problem solve (https://www.spoj.com/problems/M3TILE/) Last edit: 2018-08-05 13:42:13 |
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2018-07-15 04:09:23
This will help http://journeywithdp.blogspot.com/2018/07/way-to-solve-tiling-problems.html |
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2018-03-06 16:35:48
Find the recurrence relation. |
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2017-06-29 09:24:19
dp+bitmask |
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2017-05-24 08:28:38
Nice problem :) Ac in one go. |
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2017-04-03 07:35:41
fantastic problem :) Last edit: 2017-04-03 07:36:45 |
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2016-06-08 11:46:46
Good problem. AC in first attempt :p |
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2016-01-22 12:01:09 minhthai
backtracking is ok :) |
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2016-01-15 10:37:48 birdie
backtracking+dynamic programing |
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2015-12-30 19:06:34 Francky
Image restored. |