//ProjectEuler/ProjectEulerCPP/Headers/Problem4.hpp //Matthew Ellison // Created: 09-28-18 //Modified: 07-09-20 //Find the largest palindrome made from the product of two 3-digit numbers //Unless otherwise listed all non-standard includes are my own creation and available from https://bibucket.org/Mattrixwv/myClasses /* 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 . */ #ifndef PROBLEM4_HPP #define PROBLEM4_HPP #include #include #include "Problem.hpp" class Problem4 : public Problem{ private: //Variables //Static variables static int START_NUM; //The first number to check static int END_NUM; //The last number to check //Instance variables std::vector palindromes; //Holds all numbers that turn out to be palindromes public: //Constructor Problem4(); //Operational functions virtual void solve(); //Solve the problem virtual void reset(); //Reset the problem so it can be run again //Gets virtual std::string getString() const; //Return a string with the solution to the problem std::vector getPalindromes() const; //Returns the list of all palindromes uint64_t getLargestPalindrome() const; //Returns the largest palindrome }; /* Results: The largest palindrome is 906609 It took an average of 36.525 milliseconds to run this problem over 100 iterations */ #endif //PROBLEM4_HPP