一只小蜜蜂...

 1 #include<iostream>
 2 using namespace std;
 3 long long path(int a,int b)
 4 {
 5     if (b <= a+1)
 6         return 1;
 7     else
 8     {
 9         long long l1 = 1,l2 = 1;
10         int a1 = a + 2;
11         long long sum = 0;
12         while (a1 <= b)
13         {
14             sum = l1 + l2;
15             l1 = l2;
16             l2 = sum;
17             a1++;
18         }
19         return l2;
20     }
21 }
22 int main()
23 {
24     int n;
25     cin >> n;
26     while (n)
27     {
28         int a, b;
29         cin >> a >> b;
30         cout << path(a,b) << endl;
31         n--;
32     }
33     //system("pause");
34     return 0;
35 }