#ProjectEuler/Python/Problem6.py
#Matthew Ellison
# Created: 01-28-19
#Modified: 07-18-20
#Find the difference between the sum of the squares of the first one hundred natural numbers and the square of the sum
#Unless otherwise listed, all of my non-standard imports can be gotten from my pyClasses repository at https://bitbucket.org/Mattrixwv/pyClasses
"""
	Copyright (C) 2020  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
from Stopwatch import Stopwatch
from Unsolved import Unsolved


class Problem6(Problem):
	#Variables
	__startNum = 1
	__endNum = 100

	#Functions
	#Constructor
	def __init__(self):
		super().__init__("Find the difference between the sum of the squares of the first one hundred natural numbers and the square of the sum.")
		self.sumOfSquares = 0	#Holds the sum of the squares of all the numbers
		self.squareOfSum = 0	#Holds the square of the sum of all the numbers

	#Operational functions
	#Solve the problem
	def solve(self):
		#If the problem has already been solved do nothing and end the function
		if(self.solved):
			return

		#Start the timer
		self.timer.start()

		#Run through all numbers from 1-100 and add them to the approriate sums
		for num in range(1, 101):
			self.sumOfSquares += (num * num)	#Get the sum of the squares of the first 100 natural numbers
			self.squareOfSum += num		#Get the sum of the first 100 natural numbers so you can square it later
		#Square the normal sum
		self.squareOfSum *= self.squareOfSum

		#Stop the timer
		self.timer.stop()

		#Save the result
		self.result = "The difference between the sum of the squares and the square of the sum of the numbers 1-100 is " + str(abs(self.sumOfSquares - self.squareOfSum))

		#Throw a flag to show the problem is solved
		self.solved = True

	#Reset the problem so it can be run again
	def reset(self):
		super().reset()
		self.squareOfSum = 0
		self.sumOfSquares = 0

	#Gets
	#Returns the sum of all the squares
	def getSumOfSquares(self) -> int:
		#If the problem hasn't been solved throw an exceptions
		if(not self.solved):
			raise Unsolved("You must solve the problem before you can get the sum of squares")
		return self.sumOfSquares
	#Return the sqare of all of the sums
	def getSquareOfSum(self) -> int:
		#If the problem hasn't been solved throw an exceptions
		if(not self.solved):
			raise Unsolved("You must solve the problem before you can get the square of sum")
		return self.squareOfSum
	#Returns the requested difference
	def getDifference(self) -> int:
		#If the problem hasn't been solved throw an exceptions
		if(not self.solved):
			raise Unsolved("You must solve the problem before you can get the difference between the sum of squares and square of sum")
		return abs(self.sumOfSquares - self.squareOfSum)

#If you are running this file, automatically start the correct function
if __name__ == '__main__':
	problem = Problem6()
	print(problem.getDescription())	#Print the description of the problem
	problem.solve()	#Solve the problem
	#Print the results
	print(problem.getResult())
	print("It took " + problem.getTime() + " to solve this algorithm")

"""Results:
The difference between the sum of the squares and the square of the sum of the numbers 1-100 is 25164150
It took 24.384 microseconds to run this algorithm
"""