Hat‘s Fibonacci

100

4203968145672990846840663646


Note:
No generated Fibonacci number in excess of 2005 digits will be in the test data, ie. F(20) = 66526 has 5 digits.

import java.math.BigInteger;     
import java.util.Scanner;     
  
public class Main {     
    
    public static void main(String[] args) {     
        Scanner cin = new Scanner((System.in));     
        int  n;  
        BigInteger[] f = new BigInteger[10000];  
        f[1] = BigInteger.ONE;  
        f[2] = BigInteger.ONE;  
        f[3] = BigInteger.ONE;  
        f[4] = BigInteger.ONE;  
        for(int i=5; i<f.length;i++)   
            f[i] = f[i-1].add(f[i-2].add(f[i-3].add(f[i-4])));  
        while(cin.hasNext()){  
            n = cin.nextInt();  
            System.out.println(f[n]);  
        }  
    }     
} 

HDU 1250： Hat's Fibonacci,布布扣,bubuko.com

HDU 1250： Hat's Fibonacci

原文：http://blog.csdn.net/u013487051/article/details/37082041