Foj 1147 Tiling[ dp+高精度 ]

题目：

In how many ways can you tile a 2xn rectangle by 2x1 or 2x2 tiles?

Here is a sample tiling of a 2x17 rectangle.

代码：

import java.io.*;
import java.math.*;
import java.util.*;
import java.text.*;

public class Main{
    public static void main(String[] args)    {
        Scanner cin = new Scanner (new BufferedInputStream(System.in));
        BigInteger[] dp=new BigInteger [300];
        dp[0]=dp[1]= BigInteger.valueOf(1);
        for(int i=2;i<=250;i++)
        {
        	dp[i]=dp[i-1].add(dp[i-2].multiply(BigInteger.valueOf(2)));
        }
        while(cin.hasNext())
        {
        	int n=cin.nextInt();
        	System.out.println(dp[n]);
        }

    }
}