在线,急啊!翻译一下,谢谢各位大虾了啊!
在线,急啊!翻译一下,谢谢各位大虾了啊!
大意即可
Let's consider K-based numbers, containing exactly N digits. We define a number to be valid if its K-based notation doesn't contain two successful zeroes.
Example:
1010230 is a valid 7-digit number
1000198 is not a valid number
0001235 is not a 7-digit number, it is a 4-digit number.
Given two numbers N and K, you are to calculate an amount of valid K based numbers, contaning N digits.
You may assume that 2 ≤ K ≤ 10; 2 ≤ N; 4 ≤ N+K ≤ 18.
Input
The first line contains a number N and the second — number K.
Output
The result in decimal notation.
Sample
不要翻译机器,谢谢!!