From 67e1333c2a8ce8c723a4fe14eb33fe7a267712d6 Mon Sep 17 00:00:00 2001
From: InigoGutierrez <inigogf.95@gmail.com>
Date: Sat, 18 Nov 2017 13:24:40 +0100
Subject: Problema 100 (Wrong Answer)

---
 AceptaElReto/src/Problema100.java | 53 +++++++++++++++++++++++++++++----------
 1 file changed, 40 insertions(+), 13 deletions(-)

diff --git a/AceptaElReto/src/Problema100.java b/AceptaElReto/src/Problema100.java
index b6f47cd..aa94a98 100644
--- a/AceptaElReto/src/Problema100.java
+++ b/AceptaElReto/src/Problema100.java
@@ -5,25 +5,26 @@
  * Para la propia constante de Kaprekar deberá indicar 0.
  */
 
-import java.util.ArrayList;
+import java.util.Arrays;
 
 public class Problema100 {
 
 	public static void main(String[] args) {
 		
 		int counter;
-		final int KAPREKAR = 6174;
 		final String KAPREKAR_STRING = "6174";
 		
 		for ( String arg: args ) {
+			//System.out.println("Input: " + arg);
 			if ( arg.equals(KAPREKAR_STRING) ) {
 				System.out.println(0);
 			}
 			else {
 				counter = 0;
-				while ( arg != KAPREKAR_STRING && counter < 8 ) {
+				while ( !arg.equals(KAPREKAR_STRING) && counter < 8 ) {
 					arg = nextKaprekar(arg);
 					counter++;
+					//System.out.println("Iteration " + counter + ": " + arg);
 				}
 				System.out.println(counter);
 			}
@@ -33,18 +34,44 @@ public class Problema100 {
 	}
 
 	private static String nextKaprekar(String arg) {
-		char[] array;
-		char[] newArray = new char[4];
-		char max = 0;
-		array = arg.toCharArray();
-		// Order the array
-		for (int i = 0; i < 4; i++) {
-			for (int j = 0; j < 4; j++) {
-				if ( number > max ) {
-					
-				}
+		char[] ascending = new char[4];
+		char[] chars = arg.toCharArray();
+		for ( int i = 0; i < 4; i++ ) {
+			if (!(i >= chars.length) ) {
+				ascending[i] = chars[i];
+			}
+			else {
+				ascending[i] = '0';
 			}
 		}
+		// Order the array in ascending order
+		Arrays.sort(ascending);
+		//System.out.println("Ascending ordered for " + arg + ": " + charArrayToString(ascending));
+		
+		// Compute new value
+		int ascendingInt = Character.getNumericValue(ascending[0])*1000
+							+ Character.getNumericValue(ascending[1])*100
+							+ Character.getNumericValue(ascending[2])*10
+							+ Character.getNumericValue(ascending[3]);
+		int descendingInt = Character.getNumericValue(ascending[3])*1000
+							+ Character.getNumericValue(ascending[2])*100
+							+ Character.getNumericValue(ascending[1])*10
+							+ Character.getNumericValue(ascending[0]);
+		//System.out.println("Result: " + String.valueOf(descendingInt - ascendingInt));
+		return String.valueOf(descendingInt - ascendingInt);
 	}
 	
+	/**
+	 * For testing.
+	 * @param charArray
+	 * @return String corresponding to charArray.
+	 */
+	/*public static String charArrayToString(char[] charArray) {
+		String result = "";
+		for ( int i = 0; i < charArray.length; i++ ) {
+			result += String.valueOf(Character.getNumericValue(charArray[i]));
+		}
+		return result;
+	}*/
+	
 }
-- 
cgit v1.2.1