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+#!/usr/bin/python3
+# https://theweeklychallenge.org/blog/perl-weekly-challenge-242/#TASK2
+#
+# Task 2: Flip Matrix
+# ===================
+#
+# You are given n x n binary matrix.
+#
+# Write a script to flip the given matrix as below.
+#
+# 1 1 0
+# 0 1 1
+# 0 0 1
+#
+# a) Reverse each row
+#
+# 0 1 1
+# 1 1 0
+# 1 0 0
+#
+# b) Invert each member
+#
+# 1 0 0
+# 0 0 1
+# 0 1 1
+#
+#
+## Example 1
+##
+## Input: @matrix = ([1, 1, 0], [1, 0, 1], [0, 0, 0])
+## Output: ([1, 0, 0], [0, 1, 0], [1, 1, 1])
+#
+## Example 2
+##
+## Input: @matrix = ([1, 1, 0, 0], [1, 0, 0, 1], [0, 1, 1, 1], [1, 0, 1, 0])
+## Output: ([1, 1, 0, 0], [0, 1, 1, 0], [0, 0, 0, 1], [1, 0, 1, 0])
+#
+############################################################
+##
+## discussion
+##
+############################################################
+#
+# Just reverse and invert. Nothing complicated.
+
+def invert_reverse(array: list) -> list:
+    result: list = []
+    for x in reversed(array):
+        if x == 0:
+            result.append(1)
+        else:
+            result.append(0)
+    return result
+
+def flip_matrix(rows: list):
+    print("Input: (", end='')
+    for row in rows:
+        print("[", ", ".join(str(x) for x in row), "],", end='', sep='')
+    print(")")
+    result: list = []
+    for row in rows:
+        result.append(invert_reverse(row))
+    print("Output: (", end='')
+    for row in result:
+        print("[", ", ".join(str(x) for x in row), "],", end='', sep='')
+    print(")")
+
+flip_matrix([[1, 1, 0], [1, 0, 1], [0, 0, 0]])
+flip_matrix([[1, 1, 0, 0], [1, 0, 0, 1], [0, 1, 1, 1], [1, 0, 1, 0]])
+
+