hdu1715

import java.util.*;
import java.math.*;
import java.io.*;
class Main
{
    public static void main(String[] args)
    {
        BigInteger[] ans = new BigInteger[1000];
        ans[1]=ans[0]=BigInteger.ONE;
        for(int i=2;i<1000;i++)
            ans[i]=ans[i-1].add(ans[i-2]);   
        Scanner sc = new Scanner(new BufferedInputStream(System.in));
        int t = sc.nextInt();
        for(int i=0;i<t;i++) System.out.println(ans[sc.nextInt()-1]);
    }
}

import java.util.*;
import java.math.*;
class Main
{
    public static void main(String[] args)
    {
        BigInteger ans,t_1,t_2;
        int n,t;        
        Scanner sc = new Scanner(System.in);
        t = sc.nextInt();
        for(int i=0;i<t;i++)
        {
            ans = BigInteger.valueOf(1);
            n = sc.nextInt();
            if(n>2)
            {
                t_1 = t_2 = ans;
                for(int j=3;j<=n;j++)
                {
                    ans=t_2.add(t_1);
                    t_2=t_1;                    
                    t_1=ans;
                }
            }
            System.out.println(ans);
        }
    }
}

还是使用的BigInteger,两种方法时间相差不大.提交多次不太稳定,大约有30ms的时差.