Class Solution
Medium
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:
Input: grid = [[2,4],[6,8]], x = 2
Output: 4
Explanation: We can make every element equal to 4 by doing the following:
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Add x to 2 once.
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Subtract x from 6 once.
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Subtract x from 8 twice.
A total of 4 operations were used.
Example 2:
Input: grid = [[1,5],[2,3]], x = 1
Output: 5
Explanation: We can make every element equal to 3.
Example 3:
Input: grid = [[1,2],[3,4]], x = 2
Output: -1
Explanation: It is impossible to make every element equal.
Constraints:
m == grid.length
n == grid[i].length
1 <= m, n <= 105
1 <= m * n <= 105
1 <= x, grid[i][j] <= 104
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Constructor Summary
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Method Summary
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
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Constructor Details
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Solution
public Solution()
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Method Details
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minOperations
public int minOperations(int[][] grid, int x)
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