Create adaptive_merge_sort.py

sorts/adaptive_merge_sort.py

@@ -0,0 +1,57 @@
+def adaptive_merge_sort(sequence: list) -> list:
+    if len(sequence) < 2:
+        return sequence
+
+    aux = sequence[:]
+    print(f"Initial sequence: {sequence}")
+    adaptive_merge_sort_helper(sequence, aux, 0, len(sequence) - 1)
+    print(f"Sorted sequence: {sequence}")
+    return sequence
+
+
+def adaptive_merge_sort_helper(array: list, aux: list, low: int, high: int) -> None:
+    if high <= low:
+        return
+
+    mid = (low + high) // 2
+    print(f"Sorting: array[{low}:{mid + 1}] and array[{mid + 1}:{high + 1}]")
+
+    adaptive_merge_sort_helper(aux, array, low, mid)
+    adaptive_merge_sort_helper(aux, array, mid + 1, high)
+
+    if array[mid] <= array[mid + 1]:
+        print(f"Skipping merge as array[{mid}] <= array[{mid + 1}]")
+        array[low : high + 1] = aux[low : high + 1]
+        return
+
+    merge(array, aux, low, mid, high)
+
+
+def merge(array: list, aux: list, low: int, mid: int, high: int) -> None:
+    print(f"Merging: array[{low}:{mid + 1}] and array[{mid + 1}:{high + 1}]")
+
+    i, j = low, mid + 1
+    for k in range(low, high + 1):
+        if i > mid or j > high:
+            if i > mid:
+                aux[k] = array[j]
+                j += 1
+            else:
+                aux[k] = array[i]
+                i += 1
+        elif array[i] <= array[j]:
+            aux[k] = array[i]
+            i += 1
+        else:
+            aux[k] = array[j]
+            j += 1
+
+    for k in range(low, high + 1):
+        array[k] = aux[k]
+
+    print(f"After merge: {array[low:high + 1]}")
+
+
+# Example usage
+if __name__ == "__main__":
+    print(adaptive_merge_sort([4, 3, 1, 2]))