Sure! Below is a test case generator for the given problem statement "C: Matching."

```python
import random

def tcgen():
    # Generate a random value for N within the given range
    N = random.randint(1, 10**5)
    
    # Generate a list of N random integers between 1 and 10^9
    A = [random.randint(1, 10**9) for _ in range(N)]
    
    return N, A

# Example usage:
N, A = tcgen()
print(N)
print(' '.join(map(str, A)))
```

### Explanation:

1. **N Generation**: We randomly pick an integer `N` such that `1 ≤ N ≤ 10^5`.
2. **List A Generation**: We generate a list `A` of size `N` where each element is a random integer between `1` and `10^9`.
3. **Output**: The function returns `N` and the list `A`.

You can execute this generator to create random test cases for this problem. Here's an example of how you might use it:

```python
N, A = tcgen()
print(N)
print(' '.join(map(str, A)))
```

### Example Output:

```
8
123456789 987654321 123456789 987654321 123456789 987654321 123456789 987654321
```

This would generate the input for the problem. You can then run your solution on this input to validate its correctness.