2 files changed, 143 insertions, 0 deletions
diff --git a/challenge-202/eric-cheung/python/ch-1.py b/challenge-202/eric-cheung/python/ch-1.py
new file mode 100755
index 0000000000..b223c4f32c
--- /dev/null
+++ b/challenge-202/eric-cheung/python/ch-1.py
@@ -0,0 +1,16 @@
+
+def IsConsecOdds(arrSubInput):
+    arrSubInput.sort()
+
+    for nIndx in range(0, len(arrSubInput) - 3 + 1):
+        if arrSubInput[nIndx] % 2 == 1 and arrSubInput[nIndx + 1] - arrSubInput[nIndx] == 2 and arrSubInput[nIndx + 2] - arrSubInput[nIndx + 1] == 2:
+            return 1
+
+    return 0
+
+## arrInput = [1, 5, 3, 6]  ## Example 1
+## arrInput = [2, 6, 3, 5]  ## Example 2
+## arrInput = [1, 2, 3, 4]  ## Example 3
+arrInput = [2, 3, 5, 7]  ## Example 4
+
+print (IsConsecOdds(arrInput))
diff --git a/challenge-202/eric-cheung/python/ch-2.py b/challenge-202/eric-cheung/python/ch-2.py
new file mode 100755
index 0000000000..5e7224f51f
--- /dev/null
+++ b/challenge-202/eric-cheung/python/ch-2.py
@@ -0,0 +1,127 @@
+
+## Remarks
+## https://www.geeksforgeeks.org/maximum-count-number-of-valley-elements-in-a-subarray-of-size-k/
+
+
+## Valley
+## First Part: Non-Increasing, Could Be Empty
+## Second Part: Non-Decreasing, Could Be Empty
+
+
+## arrInput = [1, 5, 5, 2, 8]  ## Example 1
+## arrInput = [2, 6, 8, 5]  ## Example 2
+## arrInput = [9, 8, 13, 13, 2, 2, 15, 17]  ## Example 3
+## arrInput = [2, 1, 2, 1, 3]  ## Example 4
+arrInput = [1, 3, 3, 2, 1, 2, 3, 3, 2]  ## Example 5
+
+
+arrOutput = []
+arrInterOutput = []
+arrSubOutput = []
+arrTrendUpSign = []
+arrEqElem = []
+
+
+bTrendUp = True
+bPrevTrendUp = True
+bChangeSign = True
+bStart = True
+
+
+for nIndx in range(1, len(arrInput)):
+
+    if arrInput[nIndx - 1] < arrInput[nIndx]:
+        bTrendUp = True
+    elif arrInput[nIndx - 1] > arrInput[nIndx]:
+        bTrendUp = False
+    else:
+        arrEqElem.append(arrInput[nIndx])
+
+    if nIndx == 1:
+        bPrevTrendUp = bTrendUp
+        bChangeSign = True
+    elif bTrendUp and bPrevTrendUp or not bTrendUp and not bPrevTrendUp:
+        bChangeSign = False
+    elif len(arrSubOutput) > 0:
+        arrOutput.append(arrSubOutput)
+        arrTrendUpSign.append(not bTrendUp)
+        arrSubOutput = []
+        bChangeSign = True  
+
+    if bChangeSign:
+        if len(arrEqElem) > 0:
+            arrSubOutput = arrSubOutput + arrEqElem  ## Append List
+            arrEqElem = []
+
+        arrSubOutput.append(arrInput[nIndx - 1])
+
+    arrSubOutput.append(arrInput[nIndx])
+
+    bPrevTrendUp = bTrendUp
+
+
+if len(arrSubOutput) > 0:
+    arrOutput.append(arrSubOutput)
+    arrTrendUpSign.append(bTrendUp)
+    arrSubOutput = []
+
+
+## print (arrOutput)
+## print (arrTrendUpSign)
+
+for nIndx, arrElemLoop in enumerate(arrOutput):
+
+    ## print (bStart, arrTrendUpSign[nIndx])
+
+    if bStart and arrTrendUpSign[nIndx]:
+        if len(arrSubOutput) > 0:
+            for nCount in range(0, len(arrElemLoop)):
+                if arrElemLoop[nCount] != arrSubOutput[-1]:
+                    break
+            arrSubOutput = arrSubOutput + arrElemLoop[nCount:]  ## Append List
+        else:
+            arrSubOutput = arrSubOutput + arrElemLoop  ## Append List
+        
+        arrInterOutput.append(arrSubOutput)
+        arrSubOutput = []
+
+    elif bStart and not arrTrendUpSign[nIndx]:
+        if len(arrSubOutput) > 0:
+            for nCount in range(0, len(arrElemLoop)):
+                if arrElemLoop[nCount] != arrSubOutput[-1]:
+                    break
+            arrSubOutput = arrSubOutput + arrElemLoop[nCount:]  ## Append List
+        else:
+            arrSubOutput = arrSubOutput + arrElemLoop  ## Append List
+
+        bStart = False
+
+    elif not bStart and arrTrendUpSign[nIndx]:
+        if len(arrSubOutput) > 0:
+            for nCount in range(0, len(arrElemLoop)):
+                if arrElemLoop[nCount] != arrSubOutput[-1]:
+                    break
+
+            arrSubOutput = arrSubOutput + arrElemLoop[nCount:]  ## Append List
+        else:
+            arrSubOutput = arrSubOutput + arrElemLoop[1:]  ## Append List
+        
+    elif not bStart and not arrTrendUpSign[nIndx]:
+        if len(arrSubOutput) > 0:
+            arrInterOutput.append(arrSubOutput)
+            arrSubOutput = []
+        arrSubOutput = arrSubOutput + arrElemLoop  ## Append List
+        bStart = True
+
+if len(arrSubOutput) > 0:
+    arrInterOutput.append(arrSubOutput)
+    arrSubOutput = []
+
+
+arrFinalOutput = arrInterOutput[0]
+for arrElemLoop in arrInterOutput[1:]:
+    if len(arrElemLoop) > len(arrFinalOutput):
+        arrFinalOutput = arrElemLoop
+
+## print (arrInterOutput)
+print (arrFinalOutput)