2 files changed, 66 insertions, 0 deletions
diff --git a/challenge-227/eric-cheung/python/ch-1.py b/challenge-227/eric-cheung/python/ch-1.py
new file mode 100755
index 0000000000..1286f37671
--- /dev/null
+++ b/challenge-227/eric-cheung/python/ch-1.py
@@ -0,0 +1,13 @@
+
+from datetime import datetime
+
+nYearGiven = 2023  ## Example
+
+nFri_13th_Count = len([nMonthLoop + 1 for nMonthLoop in range(12) if int(datetime(nYearGiven, nMonthLoop + 1, 13).strftime("%w")) == 5])
+
+## for nMonthLoop in range(12):
+    ## strWeekDay = datetime(nYearGiven, nMonthLoop + 1, 13).strftime("%w")
+    ## if int(strWeekDay) == 5:
+        ## nFri_13th_Count = nFri_13th_Count + 1
+
+print (nFri_13th_Count)
diff --git a/challenge-227/eric-cheung/python/ch-2.py b/challenge-227/eric-cheung/python/ch-2.py
new file mode 100755
index 0000000000..ce59ffaa51
--- /dev/null
+++ b/challenge-227/eric-cheung/python/ch-2.py
@@ -0,0 +1,53 @@
+
+import roman
+
+nMaxLimit = 3999
+
+def GetRomanArithOper (strInput):
+
+    global nMaxLimit
+
+    arrElem = strInput.split()
+    nInt_01 = roman.fromRoman(arrElem[0])
+    strOperator = arrElem[1]
+    nInt_02 = roman.fromRoman(arrElem[2])
+
+    if strOperator == "+":
+        if nInt_01 + nInt_02 > nMaxLimit:
+            return "non potest"
+        return roman.toRoman(nInt_01 + nInt_02)
+
+    if strOperator == "-":
+        if nInt_01 > nInt_02:
+            return roman.toRoman(nInt_01 - nInt_02)
+        if nInt_01 == nInt_02:
+            return "nulla"
+        return "non potest"
+
+    if strOperator == "/":
+        if nInt_01 % nInt_02 == 0:
+            return roman.toRoman(int(nInt_01 / nInt_02))
+        return "non potest"
+
+    if strOperator == "*":
+        if nInt_01 * nInt_02 > nMaxLimit:
+            return "non potest"
+        return roman.toRoman(nInt_01 * nInt_02)
+
+    if strOperator == "**":
+        if nInt_01 ** nInt_02 > nMaxLimit:
+            return "non potest"
+        return roman.toRoman(nInt_01 ** nInt_02)
+
+
+## strGivenExpr = "IV + V"
+## strGivenExpr = "M - I"
+## strGivenExpr = "X / II"
+## strGivenExpr = "XI * VI"
+## strGivenExpr = "VII ** III"
+## strGivenExpr = "V - V"
+## strGivenExpr = "V / II"
+## strGivenExpr = "MMM + M"
+strGivenExpr = "V - X"
+
+print (GetRomanArithOper(strGivenExpr))