Module: (C++) For loop operator. Typical tasks


Problem

16 /16


The number of combinations from N to K

Problem

Non-negative integers n and k are given. It is necessary to output the number of combinations of n by k.
The formula for the number of combinations (you must remember that 0! = 1):
\(C^k_n=\frac{n!}{k!(n-k)!}\)

Input: integers n and k, each from a new line (each number is not more than 10, \(n >= k\))
Output: need to print one number in response

Example
Input Output
1 3
2
3
2 4
4
1