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Updated for performance

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Mattrixwv
2020-06-16 19:25:26 -04:00
parent c043df9b44
commit 349b831617
1 changed files with 19 additions and 19 deletions
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38
src/main/java/mattrixwv/ProjectEuler/Problems/Problem17.java
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@@ -1,7 +1,7 @@
//ProjectEuler/Java/Problem16.java
//Matthew Ellison
// Created: 03-04-19
//Modified: 03-28-19
//Modified: 06-16-20
//If all the numbers from 1 to 1000 (one thousand) inclusive were written out in words, how many letters would be used?
//Unless otherwise listed all non-standard includes are my own creation and available from https://bibucket.org/Mattrixwv/JavaClasses
/*
@@ -25,21 +25,21 @@ package mattrixwv.ProjectEuler.Problems;
public class Problem17 extends Problem{
//The first number to be
private static final Integer START_NUM = 1;
private static final Integer STOP_NUM = 1000;
private static final int START_NUM = 1;
private static final int STOP_NUM = 1000;
public Problem17(){
super("If all the numbers from 1 to 1000 (one thousand) inclusive were written out in words, how many letters would be used?");
}
public void solve(){
//Setup the variables needed
Integer sumOfLetters = 0;
int sumOfLetters = 0;
//Start the timer
timer.start();
//Start with 1 and increment
for(Integer num = START_NUM;num <= STOP_NUM;++num){
for(int num = START_NUM;num <= STOP_NUM;++num){
//Pass the number to a function that will create a string for the number
String currentNumString = getStringFromNum(num);
//Pass the string to ta function that will count the number of letters in it, ignoring whitespace and punctuation and add that number to the running tally
@@ -52,7 +52,7 @@ public class Problem17 extends Problem{
//Save the results
result = String.format("The sum of all the letters in all the numbers %d-%d is %d\n", START_NUM, STOP_NUM, sumOfLetters);
}
private String getStringFromNum(Integer number){
private String getStringFromNum(int number){
String numberString = new String();
//Starting with the largest digit create a string based on teh number passed in
//Check for negative
@@ -66,17 +66,17 @@ public class Problem17 extends Problem{
}
//Start with the thousands place
if((number.doubleValue() / 1000D) >= 1D){
if((number / 1000D) >= 1D){
numberString = numberString.concat(getStringFromNum((int)Math.floor(number / 1000D)));
numberString = numberString.concat(" thousand");
number -= ((int)Math.floor(number.doubleValue() / 1000D)) * 1000;
number -= ((int)Math.floor(number / 1000D)) * 1000;
}
//Check the hundreds place
if((number.doubleValue() / 100D) >= 1D){
numberString = numberString.concat(getStringFromNum((int)Math.floor(number.doubleValue() / 100D)));
if((number / 100D) >= 1D){
numberString = numberString.concat(getStringFromNum((int)Math.floor(number / 100D)));
numberString = numberString.concat(" hundred");
number -= ((int)Math.floor(number.doubleValue() / 100D)) * 100;
number -= ((int)Math.floor(number / 100D)) * 100;
}
//Insert an and if there is need
@@ -85,9 +85,9 @@ public class Problem17 extends Problem{
}
//Check for tens place
if((number.doubleValue() / 10D) >= 2D){
if((number / 10D) >= 2D){
//FOr the tens you need to do something special
Integer tensPlace = (int)Math.floor(number.doubleValue() / 10D);
int tensPlace = (int)Math.floor(number / 10D);
if(tensPlace == 9){
numberString = numberString.concat("ninety");
}
@@ -119,8 +119,8 @@ public class Problem17 extends Problem{
}
}
//Check for teens
else if((number.doubleValue() / 10D) >= 1D){
Integer onesPlace = (number % 10);
else if((number / 10D) >= 1D){
int onesPlace = (number % 10);
if(onesPlace == 9){
numberString = numberString.concat("nineteen");
}
@@ -191,10 +191,10 @@ public class Problem17 extends Problem{
//Return the string
return numberString;
}
private Integer getNumberChars(String number){
Integer sumOfLetters = 0;
private int getNumberChars(String number){
int sumOfLetters = 0;
//Start at location 0 and count the number of letters, ignoring punctuation and whitespace
for(Integer location = 0;location < number.length();++location){
for(int location = 0;location < number.length();++location){
if(Character.isAlphabetic(number.charAt(location))){
sumOfLetters += 1;
}
@@ -207,5 +207,5 @@ public class Problem17 extends Problem{
/* Results:
The sum of all the letters in all the numbers 1-1000 is 21124
It took 4.367 milliseconds to solve this problem.
It took 285.699 microseconds to solve this problem.
*/