@@ -0,0 +1,15 @@
+from collections import defaultdict
+class Solution:
+    def hasGroupsSizeX(self, deck: List[int]) -> bool:
+        counter = defaultdict(int)
+        for d in deck:
+            counter[d] += 1
+        
+        count = counter[deck[0]]
+        for _, freq in counter.items():
+            if freq == 1:
+                return False
+            count = gcd(count, freq)
+
+        return True if count != 1 else False
+