Write a program that calculates N! / K! for given N and K.
- Use only one loop.
- On the first line, there will be only one number - N
- On the second line, there will be only one number - K
- Output a single line, consisting of the result from the calculation described above.
- 1 < K < N < 100
- Hint: overflow is possible
- N and K will always be valid integer numbers
- Time limit: 0.1s
- Memory limit: 16MB