diff --git a/.idea/.gitignore b/.idea/.gitignore
new file mode 100644
index 0000000..26d3352
--- /dev/null
+++ b/.idea/.gitignore
@@ -0,0 +1,3 @@
+# Default ignored files
+/shelf/
+/workspace.xml
diff --git a/.idea/misc.xml b/.idea/misc.xml
new file mode 100644
index 0000000..6c05f06
--- /dev/null
+++ b/.idea/misc.xml
@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="ProjectRootManager" version="2" languageLevel="JDK_14" default="false" project-jdk-name="openjdk-15" project-jdk-type="JavaSDK">
+    <output url="file://$PROJECT_DIR$/out" />
+  </component>
+</project>
\ No newline at end of file
diff --git a/.idea/modules.xml b/.idea/modules.xml
new file mode 100644
index 0000000..18ef245
--- /dev/null
+++ b/.idea/modules.xml
@@ -0,0 +1,8 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="ProjectModuleManager">
+    <modules>
+      <module fileurl="file://$PROJECT_DIR$/GDP-Uebungen.iml" filepath="$PROJECT_DIR$/GDP-Uebungen.iml" />
+    </modules>
+  </component>
+</project>
\ No newline at end of file
diff --git a/.idea/vcs.xml b/.idea/vcs.xml
new file mode 100644
index 0000000..35eb1dd
--- /dev/null
+++ b/.idea/vcs.xml
@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="VcsDirectoryMappings">
+    <mapping directory="" vcs="Git" />
+  </component>
+</project>
\ No newline at end of file
diff --git a/GDP-Uebungen.iml b/GDP-Uebungen.iml
new file mode 100644
index 0000000..c77f856
--- /dev/null
+++ b/GDP-Uebungen.iml
@@ -0,0 +1,11 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<module type="JAVA_MODULE" version="4">
+  <component name="NewModuleRootManager" inherit-compiler-output="true">
+    <exclude-output />
+    <content url="file://$MODULE_DIR$">
+      <sourceFolder url="file://$MODULE_DIR$/GDP_Gesamt/src" isTestSource="false" />
+    </content>
+    <orderEntry type="inheritedJdk" />
+    <orderEntry type="sourceFolder" forTests="false" />
+  </component>
+</module>
\ No newline at end of file
diff --git a/GDP_Gesamt/src/Uebungen/Uebung5/Aufgabe4.java b/GDP_Gesamt/src/Uebungen/Uebung5/Aufgabe4.java
index 11fae40..35d8028 100644
--- a/GDP_Gesamt/src/Uebungen/Uebung5/Aufgabe4.java
+++ b/GDP_Gesamt/src/Uebungen/Uebung5/Aufgabe4.java
@@ -5,8 +5,8 @@ import java.util.Arrays;
 public class Aufgabe4 {
 
     public static void main(String[] args) {
-        int timeout = 60; // milliseconds
-        int[] testValues = {2,34,134,4,53,11,87,142,742,115,00,411,61,33,23456,2346,12,6234562,4562,4562,56245,62456,2456,24562,1,1345,13451,435,1345,1345,134,51345,134513,451,345};
+        int timeout = 150; // milliseconds
+        int[] testValues = {2,34,134,4,53,11,87,142,742,115,00,411,61,33,23456,2346,12,4562,4562,56245,62456,2456,24562};
         Arrays.sort(testValues);
         for (int value:testValues){
             int result = binarySearch(testValues,value, timeout);
@@ -17,25 +17,27 @@ public class Aufgabe4 {
         System.out.println("Searching for " + value);
         printArray(inputArray);
         int res=-1;
-        int rangeMax=inputArray.length-1, rangeMin=0,center,modulo;
+        int rangeMax=inputArray.length-1, rangeMin=0,center=0;
         long lastdate=0;
-        while(true){
+        while(res < 0){
             Date date = new Date();
             long deltaT = date.getTime()-lastdate;
             if(deltaT>timeout) {
                 lastdate = date.getTime();
-                modulo = (rangeMax - rangeMin) % 2;
-                center = rangeMin + (rangeMax - rangeMin) / 2;
-                infoGraphic( value, center,  rangeMin,  rangeMax, modulo, inputArray);
+                infoGraphic(value, center, rangeMin, rangeMax, rangeMax, inputArray);
                 if (value == inputArray[center]) {
                     res = center;
-                    break;
-                }
-                else if (value <= inputArray[center])
-                    rangeMax = center-modulo;
-                else
-                    rangeMin = center+modulo;
+                } else if (value > inputArray[center]) {
+                    rangeMin = center;
+                    center += (rangeMax+1 - rangeMin) / 2;  // round up
+                    // center = (rangeMax+1 + rangeMin) / 2;  // round up
+                } else {
+                    rangeMax = center;
+                    center -= (rangeMax+1 - rangeMin) / 2;
+                    //center -= (center+1 - rangeMin) / 2;
+                    // center = (rangeMax + rangeMin) / 2;
                 }
+            }
         }
         return res;
     }