Added solution to problem 38

ProblemSelection.py

@@ -1,10 +1,10 @@
 #ProjectEulerPython/ProblemSelection.py
 #Matthew Ellison
 # Created: 07-19-20
-#Modified: 07-19-20
+#Modified: 10-20-21
 #This is the driver function for the Java version of the ProjectEuler project
 """
-Copyright (C) 2020  Matthew Ellison
+Copyright (C) 2021  Matthew Ellison
 
 	This program is free software: you can redistribute it and/or modify
 	it under the terms of the GNU Lesser General Public License as published by
@@ -59,6 +59,7 @@ from Problems.Problem34 import Problem34
 from Problems.Problem35 import Problem35
 from Problems.Problem36 import Problem36
 from Problems.Problem37 import Problem37
+from Problems.Problem38 import Problem38
 from Problems.Problem67 import Problem67
 
 
@@ -67,7 +68,7 @@ class ProblemSelection:
 	problemNumbers = [ 0,  1,  2,  3,  4,  5,  6,  7,  8,  9, 10,
 						  11, 12, 13, 14, 15, 16, 17, 18, 19, 20,
 						  21, 22, 23, 24, 25, 26, 27, 28, 29, 30,
-						  31, 32, 33, 34, 35, 36, 37, 67]
+						  31, 32, 33, 34, 35, 36, 37, 38, 67]
 
 	#Returns the problem corresponding to the given problem number
 	@staticmethod
@@ -146,6 +147,8 @@ class ProblemSelection:
 			return Problem36()
 		elif(problemNumber == 37):
 			return Problem37()
+		elif(problemNumber == 38):
+			return Problem38()
 		elif(problemNumber == 67):
 			return Problem67()
 

Problems/Problem38.py

@@ -0,0 +1,101 @@
+#ProjectEuler/ProjectEulerPython/Problems/Problem38.py
+#Matthew Ellison
+# Created: 10-20-21
+#Modified: 10-20-21
+#What is the largest 1-9 pandigital number that can be formed as the concatenated product of an integer with 1, 2, ... n where n > 1
+#Unless otherwise listed, all of my non-standard imports can be gotten from my pyClasses repository at https://bitbucket.org/Mattrixwv/pyClasses
+"""
+	Copyright (C) 2021  Matthew Ellison
+
+	This program is free software: you can redistribute it and/or modify
+	it under the terms of the GNU Lesser General Public License as published by
+	the Free Software Foundation, either version 3 of the License, or
+	(at your option) any later version.
+
+	This program is distributed in the hope that it will be useful,
+	but WITHOUT ANY WARRANTY; without even the implied warranty of
+	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+	GNU Lesser General Public License for more details.
+
+	You should have received a copy of the GNU Lesser General Public License
+	along with this program.  If not, see <https://www.gnu.org/licenses/>.
+"""
+
+
+from Problems.Problem import Problem
+import StringAlgorithms
+
+
+class Problem38(Problem):
+	#Variables
+	__highest_possible_number = 9999	#The highest number that needs to be checked for a 1-9 pandigital
+
+	#Functions
+	#Constructor
+	def __init__(self) -> None:
+		super().__init__("What is the largest 1-9 pandigital number that can be formed as the concatenated product of an integer with 1, 2, ... n where n > 1")
+		self.largestNum = 0
+		self.pandigital = 0
+
+	#Operational functions
+	#Take the number and add its multiples to a string to return
+	def executeFormula(self, num: int) -> str:
+		#Turn the current number into a string
+		numStr = str(num)
+		numStr += str(num * 2)
+		#Multiply the number and append the product to the string until you have one long enough
+		cnt = 3
+		while(len(numStr) < 9):
+			numStr += str(num * cnt)
+			cnt += 1
+		return numStr
+	#Solve the problem
+	def solve(self) -> None:
+		#If the problem has already been solved do nothing and end the function
+		if(self.solved):
+			return
+
+		#Start the timer
+		self.timer.start()
+
+
+		#Loop from 1 -> __highest_possible_num checking for pandigitals
+		for cnt in range(1, self.__highest_possible_number + 1):
+			#Get the string from the formula
+			numStr = self.executeFormula(cnt)
+			panNum = int(numStr)
+			#If the number is pandigital save it as the highest number
+			if(StringAlgorithms.isPandigital(numStr) and (panNum > self.pandigital)):
+				self.largestNum = cnt
+				self.pandigital = panNum
+
+
+		#Stop the timer
+		self.timer.stop()
+
+		#Throw a flag to show the problem is solved
+		self.solved = True
+
+	#Reset the problem so it can be run again
+	def reset(self) -> None:
+		super().reset()
+
+	#Gets
+	#Returns a string with the solutino to the problem
+	def getResult(self) -> str:
+		self.solvedCheck("result")
+		return f"The largest appended product pandigital is {self.pandigital}"
+	#Returns the largest number
+	def getLargestNum(self) -> int:
+		self.solvedCheck("largest number")
+		return self.largestNum
+	#Returns the pandigital of the number
+	def getPandigital(self) -> int:
+		self.solvedCheck("pandigital")
+		return self.pandigital
+
+
+""" Results:
+The largest appended product pandigital is 932718654
+It took an average of 9.886 milliseconds to run this problem through 100 iterations
+"""