## M3TILE - LATGACH3

Đọc đề đẹp hơn ở:

https://codeforces.com/group/FLVn1Sc504/contest/274710/problem/L

https://codeforces.com/group/FLVn1Sc504/contest/274501/problem/Y

https://codeforces.com/group/FLVn1Sc504/contest/274710/problem/L

https://codeforces.com/group/FLVn1Sc504/contest/274501/problem/Y

English | Vietnamese |

In how many ways can you tile a 3xn rectangle with 2x1 dominoes? Here is a sample tiling of a 3x12 rectangle. Input consists of several test cases followed by a line containing -1. Each test case is a line containing an integer 0 ≤ n ≤ 30. For each test case, output one integer number giving the number of possible tilings.

### SAMPLE INPUT

2 8 12 -1

### SAMPLE OUTPUT

3 153 2131

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mrmajumder:
2020-04-26 07:59:04
Simple dp, you have to do case analysis a lot to crack this problem |

Added by: | ~!(*(@*!@^& |

Date: | 2009-02-17 |

Time limit: | 0.600s |

Source limit: | 50000B |

Memory limit: | 1536MB |

Cluster: | Cube (Intel G860) |

Languages: | All except: ERL JS-RHINO NODEJS PERL6 VB.NET |

Resource: | ACM |