woj-server/resource/runner/problem/book/ch3/5. bee/description.md

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# 蜜蜂路线
## Tags
- C++一本通
- 递推
## Description
一只蜜蜂在下图所示的数字蜂房上爬动,已知它只能从标号小的蜂房爬到标号大的相邻蜂房,现在问你:蜜蜂从蜂房$M$开始爬到蜂房$N$$M\le N$,有多少种爬行路线?
![image-20231231195207593](https://r2.0x7f.app/images/2023/12/31/95a7OUnQFlgmT67b.png)
## Example Cases
### Case 1
#### Input
```
1 14
```
#### Output
```
377
```