min_ops_uni_val_grid.py (1041B)
| # 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))
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