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59 lines
1.9 KiB
Java
59 lines
1.9 KiB
Java
//ProjectEuler/Java/Problem2.java
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//Matthew Ellison
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// Created: 03-01-19
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//Modified: 03-28-19
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//The sum of the even Fibonacci numbers less than 4,000,000
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//Unless otherwise listed all non-standard includes are my own creation and available from https://bibucket.org/Mattrixwv/JavaClasses
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/*
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Copyright (C) 2019 Matthew Ellison
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU Lesser General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with this program. If not, see <https://www.gnu.org/licenses/>.
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*/
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import mattrixwv.Stopwatch;
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import mattrixwv.Algorithms;
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import java.util.ArrayList;
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public class Problem2{
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private static final int TOP_NUM = 3999999;
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public static void main(String[] argv){
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Stopwatch timer = new Stopwatch();
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timer.start();
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//Get a list of all fibonacci numbers < 4,000,000
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ArrayList<Integer> fibNums = Algorithms.getAllFib(TOP_NUM);
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Integer sum = 0;
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//Step through very element in the list checking if it is even
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for(Integer num : fibNums){
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//If the number is even add it to the running tally
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if((num % 2) == 0){
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sum += num;
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}
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}
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timer.stop();
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//Print the results
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System.out.printf("The sum of all even fibonacci numbers <= %d is %d\n", TOP_NUM, sum);
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System.out.printf("It took %s to run this algorithm\n", timer.getStr());
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}
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}
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/* Results:
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The sum of all even fibonacci numbers <= 3999999 is 4613732
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It took 940.825 microseconds to run this algorithm
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*/
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