Update minimum-operations-to-make-a-uni-value-grid.py

Author: kamyu104

Python/minimum-operations-to-make-a-uni-value-grid.py

@@ -1,6 +1,8 @@
-# Time:  O(m * n)
+# Time:  O(m * n) on average
 # Space: O(m * n)
 
+import random
+
 class Solution(object):
     def minOperations(self, grid, x):
         """