SP3883 M3TILE - LATGACH3

[English](/problems/M3TILE/en/) [Vietnamese](/problems/M3TILE/vn/) 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. 

N/A

N/A