From aa7a448f689d56b4ecf6e08540fee9467d3dcc99 Mon Sep 17 00:00:00 2001
From: Lubos Kolouch <lubos@kolouch.net>
Date: Thu, 23 Oct 2025 12:20:07 +0200
Subject: Add Python ch-2 solution for challenge 344

---
 challenge-344/lubos-kolouch/python/ch-2.py | 84 ++++++++++++++++++++++++++++++
 1 file changed, 84 insertions(+)
 create mode 100644 challenge-344/lubos-kolouch/python/ch-2.py

diff --git a/challenge-344/lubos-kolouch/python/ch-2.py b/challenge-344/lubos-kolouch/python/ch-2.py
new file mode 100644
index 0000000000..00ac85b5e2
--- /dev/null
+++ b/challenge-344/lubos-kolouch/python/ch-2.py
@@ -0,0 +1,84 @@
+#!/usr/bin/env python3
+"""
+Perl Weekly Challenge: Task 2 - Array Formation
+Check whether the target array can be formed by concatenating the source subarrays without reordering their elements.
+"""
+
+from __future__ import annotations
+
+import unittest
+
+
+def array_formation(source: list[list[int]], target: list[int]) -> bool:
+    """
+    Determine if ``target`` can be constructed by concatenating subarrays from ``source``.
+
+    Args:
+        source (list[list[int]]): Available subarrays that may be reordered but not restructured.
+        target (list[int]): Desired array to build.
+
+    Returns:
+        bool: ``True`` if the target can be formed, otherwise ``False``.
+    """
+    used = [False] * len(source)
+    index = 0
+
+    while index < len(target):
+        matched = False
+
+        for i, piece in enumerate(source):
+            if used[i] or not piece or piece[0] != target[index]:
+                continue
+
+            if index + len(piece) > len(target):
+                continue
+
+            if all(target[index + offset] == value
+                   for offset, value in enumerate(piece)):
+                used[i] = True
+                index += len(piece)
+                matched = True
+                break
+
+        if not matched:
+            return False
+
+    return True
+
+
+class TestArrayFormation(unittest.TestCase):
+    """Unit tests for the array_formation function."""
+
+    def test_example_1(self) -> None:
+        """Example 1: ([2,3], [1], [4]) -> (1, 2, 3, 4)"""
+        source = [[2, 3], [1], [4]]
+        target = [1, 2, 3, 4]
+        self.assertTrue(array_formation(source, target))
+
+    def test_example_2(self) -> None:
+        """Example 2: ([1,3], [2,4]) -> (1, 2, 3, 4)"""
+        source = [[1, 3], [2, 4]]
+        target = [1, 2, 3, 4]
+        self.assertFalse(array_formation(source, target))
+
+    def test_example_3(self) -> None:
+        """Example 3: ([9,1], [5,8], [2]) -> (5, 8, 2, 9, 1)"""
+        source = [[9, 1], [5, 8], [2]]
+        target = [5, 8, 2, 9, 1]
+        self.assertTrue(array_formation(source, target))
+
+    def test_example_4(self) -> None:
+        """Example 4: ([1], [3]) -> (1, 2, 3)"""
+        source = [[1], [3]]
+        target = [1, 2, 3]
+        self.assertFalse(array_formation(source, target))
+
+    def test_example_5(self) -> None:
+        """Example 5: ([7,4,6]) -> (7, 4, 6)"""
+        source = [[7, 4, 6]]
+        target = [7, 4, 6]
+        self.assertTrue(array_formation(source, target))
+
+
+if __name__ == "__main__":
+    unittest.main()
-- 
cgit