Merge pull request #6387 from adamcrussell/challenge-171

initial commit

1 files changed, 37 insertions, 0 deletions

diff --git a/challenge-171/adam-russell/java/ch-1.java b/challenge-171/adam-russell/java/ch-1.java
new file mode 100644
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+++ b/challenge-171/adam-russell/java/ch-1.java
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+import java.util.ArrayList;
+
+class Abundant{
+    private static ArrayList properDivisors(int n){
+        ArrayList divisors = new ArrayList();
+        for(int i = 1; i < n / 2; i++){
+            if(n % i == 0){
+                divisors.add(new Integer(i));   
+            }
+        }
+        return divisors;
+    }
+    
+    public static ArrayList nAbundantsOdd(int n){
+        ArrayList abundants = new ArrayList();
+        int x = 1;
+        do{
+            x++;
+            if(x % 2 == 1){
+                ArrayList divisors = properDivisors(x);
+                int sum = 0;
+                for(int i = 0; i < divisors.size(); i++)
+                    sum += ((Integer)divisors.get(i)).intValue();
+                if(sum > x)
+                    abundants.add(new Integer(x));
+            }
+        }while(abundants.size() < n);
+        return abundants;
+    }
+
+    public static void main(String[] args){
+        ArrayList abundants = Abundant.nAbundantsOdd(20);
+        for(int i = 0; i < abundants.size() - 1; i++)
+            System.out.print((Integer)abundants.get(i) + ", ");
+        System.out.println((Integer)abundants.get(abundants.size() - 1));
+    }
+}
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