Create 2870.py

Author: chandansgowda

2501-3000/2870.py

@@ -0,0 +1,12 @@
+class Solution:
+    def minOperations(self, nums: List[int]) -> int:
+        d = defaultdict(int)
+        for num in nums:
+            d[num] += 1
+
+        if min(d.values()) == 1:
+            return -1
+        
+        return sum(c // 3 + (c % 3 > 0) for c in d.values())
+
+