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problems/005_problem.py

@@ -1,100 +1,35 @@
 #!/usr/bin/env python
 
-#  Problem 4:
+#  Problem 5:
 #
-#  A palindromic number reads the same both ways. 
-#  The largest palindrome made from the product 
-#  of two 2-digit numbers is 9009 = 91 × 99.
-#  
-#  Find the largest palindrome made from the 
-#  product of two 3-digit numbers.
+#  2520 is the smallest number that can 
+#  be divided by each of the numbers 
+#  from 1 to 10 without any remainder.
+# 
+#  What is the smallest positive number 
+#  that is evenly divisible by all of the 
+#  numbers from 1 to 20?
 #
 
-import decorators
-import time
+import decorators			# Typically imported to compute execution duration of functions.
+import time					# Typically imported for sleep function, to slow down execution in terminal.
 
-def is_palindrome(candidate):
+def compute_modulus(divisor,dividend):
 	"""
-	Returns a boolean to confirm if the passed
-	integer is a palindrome.
+	Returns modulus of two passed integers.
 	
-		is_palindrome(candidate)
+		is_palindrome(divisor, dividend)
 
-			param 'candidate': Integer to test for palindrom-iness.
+			param 'divisor': Integer to be divided by dividend.
+			param 'dividend': Integer dividing the divisor.
 			
 	"""
+	pass
 
-	# Convert maximum candidate to a list ...
-	listed_candidate = [int(i) for i in str(candidate)]
-	flipped_candidate = [int(i) for i in str(candidate)]
-	
-	# Determine length of maximum candidate, and manipulate.	
-	num_digits = listed_candidate.__len__()
-	digit_flips = int(num_digits/2)
-
-	for i in range(1,digit_flips):
-		flipped_candidate[-i-1] = flipped_candidate[i]
-	flipped_candidate[-1] = flipped_candidate[0]
-
-	# Compare if the flipped version and the original
-	# candidate are identical.
-	# The function returns this test result...		
-	if listed_candidate == flipped_candidate:
-		return True
-	else:
-		return False
 
 @decorators.function_timer
 def main():
 
-	# Define the problem inputs... 
-	factor_length = 3
-	
-	# Calculate intermediate inputs...
-	max_factor = 10**(factor_length)-1
-	product_of_factors = max_factor * max_factor # Maximum candidate for palindrome test. 
-	
-	# Initialize loop parameters...
-	n = max_factor
-	m = max_factor
-	n_has_token = False
-	test_passed = False
-	palindrome_list=[]
-	
-
-	while (n*m)>1:
-	
-		# Loop over all possible pairs of
-		# integers, testing for "palindrom-iness" ...
-		print("{} * {} = {}".format(n,m,n*m))
-		test_passed = is_palindrome(n*m)
-
-		if test_passed:
-			palindrome_list.append(n*m)
-			if n_has_token:
-				n -= 1
-				if n ==0:
-					n_has_token = False
-					n = m-1
-			if not n_has_token:
-				m -= 1
-				if m ==1:
-					n_has_token = True
-					m = n-1
-
-		
-		if not test_passed:
-			if n_has_token:
-				n -= 1
-				if n ==0:
-					n_has_token = False
-					n = m-1
-			if not n_has_token:
-				m -= 1
-				if m ==1:
-					n_has_token = True
-					m = n-1
-
-	print("The largest palindrome number which is a product of two numbers of length {} is {} ... ".format(factor_length,max(palindrome_list)))
+	print("The largest palindrome number which is a product of two numbers of length {} is {} ... ".format("foo","foo"))
 
 main()