@@ -75,7 +75,7 @@ public static void main(String[] args) {
         System.out.println(indexOfMax(array));
         System.out.println(sieve(5));
         System.out.println(areFactors(24,array));
-        System.out.println(areFactors(24,array));
+        System.out.println(arePrimeFactors(24,array));
     }
 
     /**
 
@@ -30,6 +30,61 @@ public static int inRange(int[] a, int low, int high) {
         return count;
     }
 
+    /**
+     * This method finds the maximum value
+     * in an int array, but
+     * only considering the elements
+     * between lowIndex and highIndex,
+     * two given integers, including both.
+     * @param array an int array
+     * @param lowIndex the minimum value considered
+     * @param highIndex the maximum value considered
+     * @return the maximum element in the range if found,
+     * an error message and a fake number otherwise
+     */
+    public static int maxInRange(int[] array, int lowIndex, int highIndex){
+        int max, max1, max2;
+        if(lowIndex==highIndex){ //base case
+            max = array[lowIndex];
+            }
+        else {
+            int count = 0;
+            if(highIndex-lowIndex==1){
+                max1=maxInRange(array,lowIndex,lowIndex);
+                max2=maxInRange(array,highIndex,highIndex);
+                if(max1>=max2)
+                    max = max1;
+                else
+                    max = max2;
+            }else {
+                int halfInterval = highIndex - (highIndex - lowIndex) / 2;
+                max1 = array[lowIndex];
+                for (int i = lowIndex; i < halfInterval; i++) {
+                    if (array[i] > max1) {
+                        max1 = array[i];
+                    }
+                }
+                max2 = array[halfInterval];
+                for (int i = halfInterval; i < highIndex; i++) {
+                    if (array[i] > max2) {
+                        max2 = array[i];
+                    }
+                }
+                if (max1 > max2)
+                    max = maxInRange(array, lowIndex, halfInterval);
+                else if (max2 > max1)
+                    max = maxInRange(array, halfInterval, highIndex);
+                else
+                    max = max1;
+            }
+        }
+        return max;
+    }
+
+    public static double max(int[] a){
+        return maxInRange(a, 0, a.length - 1);
+    }
+
     public static void main(String[] args) {
         int numValues = 8;
         int[] array = randomArray(numValues);
@@ -54,6 +109,8 @@ public static void main(String[] args) {
         for (int score : scores) {
             counts[score]++;
         }
+
+        System.out.println(maxInRange(array,2,5));
     }
 
 }
Original file line number	Diff line number	Diff line change
`@@ -75,7 +75,7 @@ public static void main(String[] args) {`
`75`	`75`	`System.out.println(indexOfMax(array));`
`76`	`76`	`System.out.println(sieve(5));`
`77`	`77`	`System.out.println(areFactors(24,array));`
`78`		`- System.out.println(areFactors(24,array));`
	`78`	`+ System.out.println(arePrimeFactors(24,array));`
`79`	`79`	`}`
`80`	`80`
`81`	`81`	`/**`