D - 1sting(相当于斐波那契数列，用大数写)

package test;
import java.util.Scanner;
import java.math.BigInteger;
public class Fib {
    static BigInteger[] num = new BigInteger[205];
    static String s;
    public static void main(String[] args){
        num[1] = new BigInteger("1");
        num[2] = new BigInteger("2");
        for(int i = 3; i <= 201; i++){               
            num[i] = num[i-1].add(num[i-2]);       
            //System.out.println(num[i]);
        }       
                        
        Scanner in = new Scanner(System.in);
        System.out.println("输入n");
        int n = in.nextInt();
        int flag = 1;
        while((n--) != 0){         
            System.out.println("输入字符串");
            if(flag == 1){
                in.nextLine();
                flag = 0;
            }
            s = in.nextLine();
            int len = s.length();        
            System.out.println(num[len]);               
        }
    }
}