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
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-value. If it is not possible, return
Input: grid = [[2,4],[6,8]], x = 2 Output: 4 Explanation: We can make every element equal to 4 by doing the following: - Add x to 2 once. - Subtract x from 6 once. - Subtract x from 8 twice. A total of 4 operations were used.
Input: grid = [[1,5],[2,3]], x = 1 Output: 5 Explanation: We can make every element equal to 3.
Input: grid = [[1,2],[3,4]], x = 2 Output: -1 Explanation: It is impossible to make every element equal.
m == grid.length
n == grid[i].length
1 <= m, n <= 105
1 <= m * n <= 105
1 <= x, grid[i][j] <= 104