Add main method with example usage to PowerSet

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Author: williamfiset

src/main/java/com/williamfiset/algorithms/other/BUILD

@@ -35,6 +35,13 @@ java_binary(
     runtime_deps = [":other"],
 )
 
+# bazel run //src/main/java/com/williamfiset/algorithms/other:PowerSet
+java_binary(
+    name = "PowerSet",
+    main_class = "com.williamfiset.algorithms.other.PowerSet",
+    runtime_deps = [":other"],
+)
+
 # bazel run //src/main/java/com/williamfiset/algorithms/other:SquareRootDecomposition
 java_binary(
     name = "SquareRootDecomposition",

src/main/java/com/williamfiset/algorithms/other/PowerSet.java

@@ -60,4 +60,16 @@ private static <T> void recurse(int at, List<T> set, List<T> current, List<List<
     current.remove(current.size() - 1);
     recurse(at + 1, set, current, result);
   }
+
+  public static void main(String[] args) {
+    List<Integer> set = List.of(1, 2, 3);
+
+    System.out.println("Binary method:");
+    for (List<Integer> subset : powerSetBinary(set))
+      System.out.println(subset);
+
+    System.out.println("\nRecursive method:");
+    for (List<Integer> subset : powerSetRecursive(set))
+      System.out.println(subset);
+  }
 }