From 18030db87580ab02962686509f65c7e1cfcd2d4c Mon Sep 17 00:00:00 2001
From: Haidong Ji
Date: Thu, 16 Aug 2018 22:18:18 -0500
Subject: Fib last digit done. Yay!

Bonus: figured PyDev TDD code generation issue. I created "sources" as a source folder, but really should have created as a package, for TDD code generation to work properly. Fixed now!---
 AlgoDesignAndTechniqueEdxPython/.pydevproject      |  5 +++-
 .../sources/__init__.py                            |  0
 .../sources/fiblastdigit.py                        | 29 ++++++++++++++++++++++
 AlgoDesignAndTechniqueEdxPython/tests/__init__.py  |  0
 .../tests/fiblastdigitTest.py                      | 25 +++++++++++++++++++
 5 files changed, 58 insertions(+), 1 deletion(-)
 create mode 100644 AlgoDesignAndTechniqueEdxPython/sources/__init__.py
 create mode 100644 AlgoDesignAndTechniqueEdxPython/sources/fiblastdigit.py
 create mode 100644 AlgoDesignAndTechniqueEdxPython/tests/__init__.py
 create mode 100644 AlgoDesignAndTechniqueEdxPython/tests/fiblastdigitTest.py

diff --git a/AlgoDesignAndTechniqueEdxPython/.pydevproject b/AlgoDesignAndTechniqueEdxPython/.pydevproject
index ab4689e..d56b5ad 100644
--- a/AlgoDesignAndTechniqueEdxPython/.pydevproject
+++ b/AlgoDesignAndTechniqueEdxPython/.pydevproject
@@ -1,10 +1,13 @@
 <?xml version="1.0" encoding="UTF-8" standalone="no"?>
 <?eclipse-pydev version="1.0"?><pydev_project>
+        
     <pydev_pathproperty name="org.python.pydev.PROJECT_SOURCE_PATH">
         <path>/${PROJECT_DIR_NAME}</path>
-        <path>/${PROJECT_DIR_NAME}/sources</path>
         <path>/${PROJECT_DIR_NAME}/tests</path>
     </pydev_pathproperty>
+        
     <pydev_property name="org.python.pydev.PYTHON_PROJECT_VERSION">python interpreter</pydev_property>
+        
     <pydev_property name="org.python.pydev.PYTHON_PROJECT_INTERPRETER">Default</pydev_property>
+    
 </pydev_project>
diff --git a/AlgoDesignAndTechniqueEdxPython/sources/__init__.py b/AlgoDesignAndTechniqueEdxPython/sources/__init__.py
new file mode 100644
index 0000000..e69de29
diff --git a/AlgoDesignAndTechniqueEdxPython/sources/fiblastdigit.py b/AlgoDesignAndTechniqueEdxPython/sources/fiblastdigit.py
new file mode 100644
index 0000000..cca9cd9
--- /dev/null
+++ b/AlgoDesignAndTechniqueEdxPython/sources/fiblastdigit.py
@@ -0,0 +1,29 @@
+# Uses python3
+import sys
+def getFibLastDigitNaive(n):
+    if n <= 1:
+        return n
+ 
+    previous = 0
+    current  = 1
+ 
+    for _ in range(n - 1):
+        previous, current = current, previous + current
+ 
+    return current % 10
+
+
+def getFibLastDigitOptimized(n):
+    if (n <= 1):
+        return n
+    fibLst = [None] * (n+1)
+    fibLst[0] = 0
+    fibLst[1] = 1
+    for i in range(2, n+1):
+        fibLst[i] = (fibLst[i-1] + fibLst[i-2]) % 10
+    return fibLst[n]
+
+if __name__ == '__main__':
+    input = sys.stdin.read()
+    n = int(input)
+    print(getFibLastDigitOptimized(n))
diff --git a/AlgoDesignAndTechniqueEdxPython/tests/__init__.py b/AlgoDesignAndTechniqueEdxPython/tests/__init__.py
new file mode 100644
index 0000000..e69de29
diff --git a/AlgoDesignAndTechniqueEdxPython/tests/fiblastdigitTest.py b/AlgoDesignAndTechniqueEdxPython/tests/fiblastdigitTest.py
new file mode 100644
index 0000000..040197b
--- /dev/null
+++ b/AlgoDesignAndTechniqueEdxPython/tests/fiblastdigitTest.py
@@ -0,0 +1,25 @@
+'''
+Created on Aug 16, 2018
+
+@author: haidong
+'''
+import unittest
+
+from sources.fiblastdigit import getFibLastDigitNaive
+
+
+class Test(unittest.TestCase):
+
+
+    def testName(self):
+        self.assertEqual(0, getFibLastDigitNaive(0))
+        self.assertEqual(1, getFibLastDigitNaive(1))
+        self.assertEqual(2, getFibLastDigitNaive(3))
+        self.assertEqual(5, getFibLastDigitNaive(40))
+        self.assertEqual(9, getFibLastDigitNaive(331))
+        self.assertEqual(5, getFibLastDigitNaive(327305))
+
+
+if __name__ == "__main__":
+    #import sys;sys.argv = ['', 'Test.testName']
+    unittest.main()
-- 
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