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-value. If it is not possible, return -1.
Example 1
2 4 6 8
Input
grid = [[2,4],[6,8]], x = 2Output
4We can make every element equal to 4 using 4 total operations: add x to 2 once, subtract x from 6 once, and subtract x from 8 twice.
Example 2
1 5 2 3
Input
grid = [[1,5],[2,3]], x = 1Output
5We can make every element equal to 3 in 5 operations.
Constraints
- m == grid.length
- n == grid[i].length
- 1 <= m, n <= 10^5
- 1 <= m * n <= 10^5
- 1 <= x, grid[i][j] <= 10^4