[LC] 3402 Minimum Operations to Make Columns Strictly Increasing

Java

/**
 * <a href="https://leetcode.cn/problems/minimum-operations-to-make-columns-strictly-increasing/">Minimum Operations to Make Columns Strictly Increasing</a>
 */
class Solution {
    public int minimumOperations(int[][] grid) {
        int counter = 0;
        for (int i = 0; i < grid[0].length; i++) {
            for (int j = 1; j < grid.length; j++) {
                int delta = grid[j][i] - grid[j - 1][i];
                if (delta <= 0) {
                    grid[j][i] += -delta + 1;
                    counter += -delta + 1;
                }
            }
        }
        return counter;
    }
}

Go

func minimumOperations(grid [][]int) int {
    counter := 0
    for i := 0; i < len(grid[0]); i++ {
        for j := 0; j < len(grid)-1; j++ {
            delta := grid[j+1][i] - grid[j][i]
            if delta <= 0 {
                grid[j][i] += -delta + 1
                counter += -delta + 1
            }
        }
    }
    return counter
}