diff --git a/src/hackerrank/interview_preparation_kit/arrays/two_d_array.py b/src/hackerrank/interview_preparation_kit/arrays/two_d_array.py
index e33f6900..d3e4e762 100644
--- a/src/hackerrank/interview_preparation_kit/arrays/two_d_array.py
+++ b/src/hackerrank/interview_preparation_kit/arrays/two_d_array.py
@@ -9,18 +9,20 @@
 def gethourglass(arr: list[list[int]], position_x: int, position_y: int) -> list[int]:
     result: list[int] = []
 
-    # top
-    result.append(arr[position_x - 1][position_y - 1])
-    result.append(arr[position_x - 1][position_y])
-    result.append(arr[position_x - 1][position_y + 1])
-
-    # middle
-    result.append(arr[position_x][position_y])
-
-    # bottom
-    result.append(arr[position_x + 1][position_y - 1])
-    result.append(arr[position_x + 1][position_y])
-    result.append(arr[position_x + 1][position_y + 1])
+    result.extend(
+        [
+            # top
+            arr[position_x - 1][position_y - 1],
+            arr[position_x - 1][position_y],
+            arr[position_x - 1][position_y + 1],
+            # middle
+            arr[position_x][position_y],
+            # bottom
+            arr[position_x + 1][position_y - 1],
+            arr[position_x + 1][position_y],
+            arr[position_x + 1][position_y + 1]
+        ]
+    )
 
     return result
 
diff --git a/src/hackerrank/warmup/plus_minus.py b/src/hackerrank/warmup/plus_minus.py
index e38df445..3579c654 100644
--- a/src/hackerrank/warmup/plus_minus.py
+++ b/src/hackerrank/warmup/plus_minus.py
@@ -18,11 +18,11 @@ def plusMinus(arr: list[int]) -> str:
         if value == 0:
             zeros += 1
 
-    result: list[str] = []
-
-    result.append(f'{positives / len(arr):.6f}')
-    result.append(f'{negatives / len(arr):.6f}')
-    result.append(f'{zeros / len(arr):.6f}')
+    result: list[str] = [
+        f'{positives / len(arr):.6f}',
+        f'{negatives / len(arr):.6f}',
+        f'{zeros / len(arr):.6f}'
+    ]
 
     output: str = '\n'.join(result)