题意：第一次用java写代码。。纪念一下。。虽然写的有点挫。。

1 import java.math.BigInteger; 2 import java.util.Scanner; 3  4  5 public class Main { 6  7         public static void main(String[] args) { 8         9          Scanner cin = new Scanner(System.in);10          while(cin.hasNext()){11              int cnt = 0;12              BigInteger l = cin.nextBigInteger();13              BigInteger r = cin.nextBigInteger();14              int t1 = l.compareTo(BigInteger.ZERO);15              int t2 = r.compareTo(BigInteger.ZERO);16              if (t1==0&&t2==0)17                  break;18              BigInteger f1 = BigInteger.valueOf(1);19              BigInteger f2 = BigInteger.valueOf(2);20              int s1 = l.compareTo(f1);21              int s2 = r.compareTo(f1);22              if(s1<=0&&s2>=0)23                  cnt++;24              s1 = l.compareTo(f2);25              s2 = r.compareTo(f2);26              if(s1<=0&&s2>=0)27                  cnt++;28              while(true)29              {30                 BigInteger f = f1.add(f2);31                 s1 = l.compareTo(f);32                 s2 = r.compareTo(f);33                 if(s1<=0&&s2>=0)34                      cnt++;35                 if (s2 < 0)36                     break;37                 f1 = f2; 38                 f2 = f;39              }40              System.out.println(cnt);41              42          }43     }44 45 }