leetcode944

public class Solution
    {
        public int MinDeletionSize(string[] A)
        {
            var result = 0;
            for (int j = 0; j < A[0].Length; j++)
            {
                for (int i = 1; i < A.Length; i++)
                {
                    if (A[i - 1][j] > A[i][j])
                    {
                        result++;
                        break;
                    }
                }
            }
            return result;
        }
    }