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+# 2033. Minimum Operations to Make a Uni-Value Grid
+
+"""
+you are given a 2d integer 'grid' of size 'm x n' and an integer 'x'. in one
+operation, you can add 'x' to or subtract 'x' from any element in the 'grid'.
+a uni-value grid is a grid where all the elements of it are equal. return the
+minimum number of operations to make the grid uni-valued. if it is not
+possible, return -1.
+"""
+
+
+class Solution(object):
+ def minOperations(self, grid, x):
+ """
+ :type grid: List[List[int]]
+ :type x: int
+ :rtype: int
+ """
+ vals = sorted([i for j in grid for i in j])
+ diff = [abs(i - vals[0]) % x for i in vals]
+ if any(i != 0 for i in diff):
+ return -1
+ med = vals[len(vals) // 2]
+ ans = sum(abs(i - med) // x for i in vals)
+ return ans
+
+
+if __name__ == "__main__":
+ obj = Solution()
+ print(obj.minOperations(grid=[[2, 4], [6, 8]], x=2))
+ print(obj.minOperations(grid=[[1, 5], [2, 3]], x=1))
+ print(obj.minOperations(grid=[[1, 2], [3, 4]], x=2))