Orig Description
Factorial
Write a program which reads an integer n and prints the factorial of n. You can assume that n ≤ 20.
Input
An integer n (1 ≤ n ≤ 20) in a line.
Output
Print the factorial of n in a line.
Sample Input
5
Output for the Sample Input
120
Extracted Specification
An integer n (1 ≤ n ≤ 20).
### Example Input:
```
5
```
### Function Signature:
Write a function f(n) that takes in the input.
def f(n: int):
'''
n: an integer
'''
Test Case Generator
Certainly! Here is a test case generator for the given "Factorial" problem statement:
### Problem Statement: Factorial
**Description**
Write a program which reads an integer \(n\) and prints the factorial of \(n\). You can assume that \(n \leq 20\).
**Input**
An integer \(n\) (1 ≤ \(n\) ≤ 20) in a line.
**Output**
Print the factorial of \(n\) in a line.
**Sample Input**
```
5
```
**Output for the Sample Input**
```
120
```
### Test Case Generator
Here is the test case generator function for the above problem:
```python
import random
def tcgen():
# Generate a random integer n between 1 and 20 (inclusive)
n = random.randint(1, 20)
return n
# Example usage:
for _ in range(5):
print(tcgen())
```
### Explanation
- The function `tcgen()` generates a random integer \(n\) within the range \(1 \leq n \leq 20\).
- This function can be used to generate multiple test cases by calling it multiple times, as shown in the example usage.
You can run the `tcgen()` function to generate random test cases for the "Factorial" problem, ensuring that the value of \(n\) is always within the specified range.
Extract Arguments
def extract_arguments(fh):
n = int(fh.readline().strip())
return (n,)