Problem p00077 - Generation 3

Orig Description

Run Length Encoding
When a string has consecutive characters, you can compress the string by replacing the characters with a rule. For example, if the string is "AAAA", you can represent it as "@4A" and compress it by one character. Create a program that takes a compressed string as input and restores it to the original string. However, the restored string should not contain the "@" character.
In addition, the original string consists of uppercase and lowercase letters, digits, and symbols, and is within 100 characters. Consecutive characters are up to 9 characters.
Input
Multiple strings are given. Each line contains one string. The number of strings is no more than 50.
Output
For each string, output the restored string for each character on one line.
Sample Input
ab@5C1@8050
@99+1=1@90
Output for the Sample Input
abCCCCC10000000050
999999999+1=1000000000

Extracted Specification

An integer M (1 ≤ M ≤ 50), representing the number of lines.
M strings, each string has a length of at most 100 characters. The strings consist of uppercase and lowercase letters, digits, and symbols.

### Example Input:

```
2
ab@5C1@8050
@99+1=1@90
```

### Function Signature:
Write a function f(inputs) that takes in the input as a list of strings.
def f(inputs: List[str]):
    '''
    inputs: a list of strings
    '''

Test Case Generator

Sure! Let's create a test case generator for the "Run Length Encoding" problem. The generator will create multiple compressed strings, each with a mix of plain characters and encoded sequences using the "@" notation.

Here's a possible implementation in Python:

```python
import random
import string

def generate_compressed_string():
    original = []
    length = random.randint(1, 100)  # Length of the original string is up to 100 characters
    i = 0
    
    while i < length:
        # Decide whether to add a normal character or a compressed sequence
        if random.choice([True, False]) and i + 2 <= length:  # Ensure there's space for a compressed sequence
            char = random.choice(string.ascii_letters + string.digits + string.punctuation)
            count = random.randint(2, 9)  # 2 to 9 consecutive characters
            original.append(f"@{count}{char}")
            i += 2  # One character for '@' and one for the count
        else:
            original.append(random.choice(string.ascii_letters + string.digits + string.punctuation))
            i += 1
    
    return ''.join(original)

def tcgen():
    num_strings = random.randint(1, 50)  # Number of strings, up to 50
    test_cases = [generate_compressed_string() for _ in range(num_strings)]
    return test_cases

if __name__ == "__main__":
    test_cases = tcgen()
    for tc in test_cases:
        print(tc)
```

### Explanation:

1. **generate_compressed_string()**:
    - This function generates a single compressed string.
    - It randomly decides whether to add a plain character or an encoded sequence.
    - Plain characters are chosen from uppercase and lowercase letters, digits, and symbols.
    - Encoded sequences use the "@" notation with a subsequent digit (2 to 9) and a character.

2. **tcgen()**:
    - This function generates a list of compressed strings, with the number of strings being up to 50.
    - Each string is generated using the `generate_compressed_string()` function.

To use this generator, simply call the `tcgen()` function, and it will return a list of compressed strings as test cases. Each string can be printed or used directly in testing environments.

This setup ensures that each test case adheres to the constraints given in the problem statement and provides a diverse set of inputs for robust testing.

Extract Arguments

def extract_arguments(fh):
    inputs = []
    for line in fh:
        inputs.append(line.strip())
    return inputs