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Updated for performance

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Mattrixwv
2020-06-16 17:48:44 -04:00
parent e266ccdf01
commit 187dcaedd7
1 changed files with 8 additions and 9 deletions
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17
src/main/java/mattrixwv/ProjectEuler/Problems/Problem15.java
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@@ -1,12 +1,11 @@
//ProjectEuler/Java/Problem15.java
//Matthew Ellison
// Created: 03-04-19
//Modified: 03-28-19
//Modified: 06-16-20
//How many routes from the top left corner to the bottom right corner are there through a 20×20 grid if you can only move right and down?
//Unless otherwise listed all non-standard includes are my own creation and available from https://bibucket.org/Mattrixwv/JavaClasses
//This program has not been tested fully and has not even been run to completion because of the long time it takes to run
/*
Copyright (C) 2019 Matthew Ellison
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
@@ -26,9 +25,9 @@ package mattrixwv.ProjectEuler.Problems;
public class Problem15 extends Problem{
//The width of the box to traverse
private static final Integer WIDTH = 20;
private static final int WIDTH = 20;
//The height of the box to traverse
private static final Integer LENGTH = 20;
private static final int LENGTH = 20;
//The number of routes from 0, 0 to 20, 20
private Long numOfRoutes = 0L;
@@ -37,8 +36,8 @@ public class Problem15 extends Problem{
}
public void solve(){
//Setup the rest of the variables
Integer currentX = 0; //The current x location on the grid
Integer currentY = 0; //The current y location on the grid
int currentX = 0; //The current x location on the grid
int currentY = 0; //The current y location on the grid
//Start the timer
timer.start();
@@ -55,7 +54,7 @@ public class Problem15 extends Problem{
}
//This function acts as a handler for moving the position on the grid and counting the distance
//It moves right first, then down
private void move(Integer currentX, Integer currentY){
private void move(int currentX, int currentY){
//Check if you are at the end and act accordingly
if((currentX == WIDTH) && (currentY == LENGTH)){
++numOfRoutes;
@@ -76,5 +75,5 @@ public class Problem15 extends Problem{
/* Results:
The number of routes is 137846528820
It took 26.396 minutes to solve this problem.
It took 19.764 minutes to solve this problem.
*/