TWC276

1 files changed, 18 insertions, 0 deletions

diff --git a/challenge-276/deadmarshal/java/Ch2.java b/challenge-276/deadmarshal/java/Ch2.java
new file mode 100644
index 0000000000..c8237e9f2b
--- /dev/null
+++ b/challenge-276/deadmarshal/java/Ch2.java
@@ -0,0 +1,18 @@
+import java.util.Collections;
+import java.util.HashMap;
+import java.util.Map;
+
+public class Ch2 {
+  public static void main(String[] args) {
+    System.out.println(maximum_frequency(new int[]{1, 2, 2, 4, 1, 5}));
+    System.out.println(maximum_frequency(new int[]{1, 2, 3, 4, 5}));
+  }
+
+  private static int maximum_frequency(int[] arr) {
+    Map<Integer, Integer> hash = new HashMap<>();
+    for (int e : arr) hash.put(e, hash.getOrDefault(e, 0) + 1);
+    int max = Collections.max(hash.values());
+    return (int) hash.keySet().stream()
+      .filter(e -> hash.get(e) == max).count() * max;
+  }
+}