Create Minimum Number of Operations to Make Array Empty.java

varunu28 · web-flow · commit 8fd3a652faf2 · 2023-10-09T06:51:27.000-07:00
diff --git a/Medium/Minimum Number of Operations to Make Array Empty.java b/Medium/Minimum Number of Operations to Make Array Empty.java
@@ -0,0 +1,16 @@
+class Solution {
+    public int minOperations(int[] nums) {
+        Map<Integer, Long> map = Arrays.stream(nums)
+        .boxed()
+        .collect(
+            Collectors.groupingBy(Function.identity(), HashMap::new, Collectors.counting()));
+        int operations = 0;
+        for (Long value : map.values()) {
+            if (value == 1) {
+                return -1;
+            }
+            operations += (int) (value / 3 + (value % 3 != 0 ? 1 : 0));
+        }
+        return operations;
+    }
+}
