Merge branch 'manwar:master' into rogerbw-challenge-234

1 files changed, 48 insertions, 0 deletions

diff --git a/challenge-234/packy-anderson/java/Ch2.java b/challenge-234/packy-anderson/java/Ch2.java
new file mode 100644
index 0000000000..ec53d291f7
--- /dev/null
+++ b/challenge-234/packy-anderson/java/Ch2.java
@@ -0,0 +1,48 @@
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.stream.Collectors;
+
+public class Ch2 {
+  public static ArrayList<int[]> findTriplets(int[] ints) {
+    ArrayList<int[]> solutions = new ArrayList<int[]>();
+    for (int i = 0; i < ints.length - 2; i++) {
+      for (int j = i + 1; j < ints.length - 1; j++) {
+        for (int k = j + 1; k < ints.length; k++) {
+          if (ints[i] != ints[j] &&
+              ints[j] != ints[k] &&
+              ints[i] != ints[k]) {
+            int triplet[] = {i, j, k};
+            solutions.add( triplet );
+          }
+        }
+      }
+    }
+    return solutions;
+  }
+
+  public static void solution(int[] ints) {
+    String joined = Arrays.stream(ints)
+                           .mapToObj(String::valueOf)
+                           .collect(Collectors.joining(", "));
+    System.out.println("Input: @ints = (" + joined + ")");
+    ArrayList<int[]> solutions = findTriplets(ints);
+    System.out.println(String.format("Output: %1$d", solutions.size()));
+    for (int[] solution : solutions) {
+      System.out.println(String.format(
+        "(%1$d, %2$d, %3$d) because %4$d != %5$d != %6$d",
+        solution[0],  solution[1],  solution[2],
+        ints[solution[0]],  ints[solution[1]],  ints[solution[2]]
+      ));
+    }
+  }
+  public static void main(String[] args) {
+    System.out.println("Example 1:");
+    solution(new int[] {4, 4, 2, 4, 3});
+
+    System.out.println("\nExample 2:");
+    solution(new int[] {1, 1, 1, 1, 1});
+
+    System.out.println("\nExample 3:");
+    solution(new int[] {4, 7, 1, 10, 7, 4, 1, 1});
+  }
+}
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