HDU-ACM2070

Fibbonacci Number

Time Limit: 1000/1000 MS (Java/Others)    Memory Limit: 32768/32768 K (Java/Others)
Total Submission(s): 20504    Accepted Submission(s): 9550

Problem Description

Your objective for this question is to develop a program which will generate a fibbonacci number. The fibbonacci function is defined as such:

f(0) = 0
f(1) = 1
f(n) = f(n-1) + f(n-2)

Your program should be able to handle values of n in the range 0 to 50.

 

Input

Each test case consists of one integer n in a single line where 0≤n≤50. The input is terminated by -1.

 

Output

Print out the answer in a single line for each test case.

 

Sample Input

345-1

 

Sample Output

235
Hint
Note:
 you can use 64bit integer: __int64

import java.util.Scanner;public class Main {    public static void main(String[] args) {        Scanner input=new Scanner(System.in);        long arr[]=new long[51];        arr[0]=0;        arr[1]=1;        for (int i=2;i<arr.length;i++){            arr[i]=arr[i-1]+arr[i-2];        }        while (input.hasNext()){            int n=input.nextInt();            if (n==-1){                return;            }            System.out.println(arr[n]);        }    }}