2 files changed, 40 insertions, 0 deletions
diff --git a/challenge-249/eric-cheung/python/ch-1.py b/challenge-249/eric-cheung/python/ch-1.py
new file mode 100755
index 0000000000..e41155cc52
--- /dev/null
+++ b/challenge-249/eric-cheung/python/ch-1.py
@@ -0,0 +1,16 @@
+
+arrInt = [3, 2, 3, 2, 2, 2]  ## Example 1
+## arrInt = [1, 2, 3, 4]  ## Example 2
+
+arrUniq = list(set(arrInt))
+arrCount = [arrInt.count(nLoop) for nLoop in arrUniq]
+arrOutput = []
+
+if any(nLoop % 2 == 1 for nLoop in arrCount):
+    print ([])
+else:
+    for nIndx in range(len(arrUniq)):
+        for nCount in range(int(arrCount[nIndx] / 2)):
+            arrOutput.append([arrUniq[nIndx], arrUniq[nIndx]])
+
+    print (arrOutput)
diff --git a/challenge-249/eric-cheung/python/ch-2.py b/challenge-249/eric-cheung/python/ch-2.py
new file mode 100755
index 0000000000..79efde5aea
--- /dev/null
+++ b/challenge-249/eric-cheung/python/ch-2.py
@@ -0,0 +1,24 @@
+
+## Ref.
+## https://leetcode.com/problems/di-string-match/
+## https://algo.monster/liteproblems/942
+
+def GetDiStrMatch (strInput):
+
+    arrOutput = []
+    nLow, nHigh = 0, len(strInput)
+    for charLoop in strInput:
+        if charLoop == "I":
+            arrOutput.append(nLow)
+            nLow = nLow + 1
+        else:
+            arrOutput.append(nHigh)
+            nHigh = nHigh - 1
+    arrOutput.append(nLow)
+    return arrOutput
+
+## strExample = "IDID"  ## Example 1
+## strExample = "III"  ## Example 2
+strExample = "DDI"  ## Example 3
+
+print (GetDiStrMatch(strExample))