Solutions by Lubos Kolouch.

# The Weekly Challenge - 336

## Task 1: Equal Group

### Description

Given an array of integers, determine whether it can be partitioned into one or
more groups of equal size (at least two elements per group) such that every
member within a group has the same value.

### Solution

#### Perl (ch-1.pl)

Counts occurrences of each value, ensures every frequency is at least two, and
computes the greatest common divisor across the frequencies. A GCD of two or
more confirms that the array can be divided into uniform groups. Embedded
`Test::More` cases cover the official examples.

#### Python (ch-1.py)

Uses `collections.Counter` and `math.gcd` to mirror the Perl logic. Type hints
and `unittest` tests verify the five examples supplied in the challenge.

### Examples

- Example 1: `[1, 1, 2, 2, 2, 2]` → `True`
- Example 2: `[1, 1, 1, 2, 2, 2, 3, 3]` → `False`
- Example 3: `[5, 5, 5, 5, 5, 5, 7, 7, 7, 7, 7, 7]` → `True`
- Example 4: `[1, 2, 3, 4]` → `False`
- Example 5: `[8, 8, 9, 9, 10, 10, 11, 11]` → `True`

## Task 2: Final Score

### Description

Given a sequence of scoring operations consisting of integers, `C`, `D`, and
`+`, compute the final total. `C` removes the previous score, `D` doubles it,
and `+` adds the last two scores.

### Solution

#### Perl (ch-2.pl)

Maintains a stack of recorded scores, applying each operation as specified, and
returns the sum of the stack. `Test::More` subtests cover the challenge cases.

#### Python (ch-2.py)

Implements the same stack-based logic using type annotations and `unittest`
coverage for the provided examples.

### Examples

- Example 1: `["5", "2", "C", "D", "+"]` → `30`
- Example 2: `["5", "-2", "4", "C", "D", "9", "+", "+"]` → `27`
- Example 3: `["7", "D", "D", "C", "+", "3"]` → `45`
- Example 4: `["-5", "-10", "+", "D", "C", "+"]` → `-55`
- Example 5: `["3", "6", "+", "D", "C", "8", "+", "D", "-2", "C", "+"]` → `128`

## Running the Code

### Perl

```bash
perl ch-1.pl
perl ch-2.pl
```

### Python

```bash
python3 ch-1.py
python3 ch-2.py
```