Create 2870-minimum-number-of-operations-to-make-array-empty.kt

Author: a93a

kotlin/2870-minimum-number-of-operations-to-make-array-empty.kt

@@ -0,0 +1,13 @@
+class Solution {
+    fun minOperations(nums: IntArray): Int {
+        val count = nums.asIterable().groupingBy { it }.eachCount()
+
+        var res = 0
+        for (c in count.values) {
+            if (c == 1) return -1
+            res += (c / 3) + if (c % 3 > 0) 1 else 0 // "Ceil" function
+        }
+
+        return res
+    }
+}