Create Intersection of Multiple Arrays.java

varunu28 · web-flow · commit 12cbf3316943 · 2022-04-24T02:03:51.000-07:00
diff --git a/Easy/Intersection of Multiple Arrays.java b/Easy/Intersection of Multiple Arrays.java
@@ -0,0 +1,19 @@
+import java.util.Map.Entry;
+
+
+class Solution {
+  public List<Integer> intersection(int[][] nums) {
+    Map<Integer, Integer> counter = new HashMap<>();
+    for (int[] num : nums) {
+      for (int element : num) {
+        counter.put(element, counter.getOrDefault(element, 0) + 1);
+      }
+    }
+    return counter.entrySet()
+      .stream()
+      .filter(entry -> entry.getValue() == nums.length)
+      .map(Entry::getKey)
+      .sorted()
+      .collect(Collectors.toList());
+  }
+}
