2 files changed, 48 insertions, 0 deletions
diff --git a/challenge-321/eric-cheung/python/ch-1.py b/challenge-321/eric-cheung/python/ch-1.py
new file mode 100755
index 0000000000..6bd299ac82
--- /dev/null
+++ b/challenge-321/eric-cheung/python/ch-1.py
@@ -0,0 +1,19 @@
+
+## arrNums = [1, 2, 4, 3, 5, 6]  ## Example 1
+## arrNums = [0, 2, 4, 8, 3, 5]  ## Example 2
+arrNums = [7, 3, 1, 0, 5, 9]  ## Example 3
+
+arrNums = sorted(arrNums)
+
+arrAvg = []
+
+while len(arrNums) > 0:
+    nMax = arrNums[-1]
+    nMin = arrNums[0]
+
+    arrAvg.append((nMax + nMin) / 2)
+
+    arrNums.pop(-1)
+    arrNums.pop(0)
+
+print (len(set(arrAvg)))
diff --git a/challenge-321/eric-cheung/python/ch-2.py b/challenge-321/eric-cheung/python/ch-2.py
new file mode 100755
index 0000000000..092cd5378f
--- /dev/null
+++ b/challenge-321/eric-cheung/python/ch-2.py
@@ -0,0 +1,29 @@
+
+def GetRefineStr (strInput):
+    arrTemp = list(strInput)
+    while "#" in arrTemp:
+        nPosBackSpace = arrTemp.index("#")
+        arrTemp.pop(nPosBackSpace)
+        arrTemp.pop(nPosBackSpace - 1)
+
+    return "".join(arrTemp)
+
+## Example 1
+## strInput_01 = "ab#c"
+## strInput_02 = "ad#c"
+
+## Example 2
+## strInput_01 = "ab##"
+## strInput_02 = "a#b#"
+
+## Example 3
+strInput_01 = "a#b"
+strInput_02 = "c"
+
+strInput_01_rev = GetRefineStr(strInput_01)
+strInput_02_rev = GetRefineStr(strInput_02)
+
+## print (strInput_01_rev)
+## print (strInput_02_rev)
+
+print (strInput_01_rev == strInput_02_rev)