2 files changed, 63 insertions, 0 deletions
diff --git a/challenge-227/lubos-kolouch/python/ch-1.py b/challenge-227/lubos-kolouch/python/ch-1.py
new file mode 100644
index 0000000000..1a2e1d0042
--- /dev/null
+++ b/challenge-227/lubos-kolouch/python/ch-1.py
@@ -0,0 +1,19 @@
+#!/usr/bin/env python
+# -*- coding: utf-8 -*-
+
+from datetime import datetime, timedelta
+
+
+def friday_13ths(year):
+    dt = datetime(year, 1, 1)
+    friday_13_count = 0
+
+    while dt.year == year:
+        if dt.weekday() == 4 and dt.day == 13:
+            friday_13_count += 1
+        dt += timedelta(days=1)
+
+    return friday_13_count
+
+
+print(friday_13ths(2023))  # 2
diff --git a/challenge-227/lubos-kolouch/python/ch-2.py b/challenge-227/lubos-kolouch/python/ch-2.py
new file mode 100644
index 0000000000..9c2e4a9ee2
--- /dev/null
+++ b/challenge-227/lubos-kolouch/python/ch-2.py
@@ -0,0 +1,44 @@
+#!/usr/bin/env python
+# -*- coding: utf-8 -*-
+
+import roman
+
+
+def roman_maths(expr):
+    # Parse the expression into two Roman numerals and the operation
+    num1, op, num2 = expr.split()
+    num1 = roman.fromRoman(num1.upper())
+    num2 = roman.fromRoman(num2.upper())
+    # Perform the operation
+    if op == '+':
+        result = num1 + num2
+    elif op == '-':
+        result = num1 - num2
+    elif op == '*':
+        result = num1 * num2
+    elif op == '/':
+        if num2 == 0:
+            return "non potest"  # they didn't do fractions
+        result = num1 // num2
+    elif op == '**':
+        result = num1 ** num2
+    else:
+        return "Invalid operation"
+    # Check the result
+    if result <= 0:
+        return "nulla" if result == 0 else "non potest"  # they didn't do negative numbers
+    elif result > 3999:
+        return "non potest"  # they only went up to 3999
+    # Convert the result back into a Roman numeral
+    return roman.toRoman(result)
+
+
+print(roman_maths("IV + V"))  # should print IX
+print(roman_maths("M - I"))  # should print CMXCIX
+print(roman_maths("X / II"))  # should print V
+print(roman_maths("XI * VI"))  # should print LXVI
+print(roman_maths("VII ** III"))  # should print CCCXLIII
+print(roman_maths("V - V"))  # should print nulla
+print(roman_maths("V / II"))  # should print non potest
+print(roman_maths("MMM + M"))  # should print non potest
+print(roman_maths("V - X"))  # should print non potest