力扣每日一题2022-05-12删列造序

• • 题目描述
  • 思路
  • • 模拟
    • • Python实现
      • Java实现

删列造序

根据题意模拟即可。对于第j列，只需要判断所有相邻字符判断strs[i-1][j] <= strs[i][j]即可。

class Solution:
    def minDeletionSize(self, strs: List[str]) -> int:
        return sum(list(column) != sorted(column) for column in zip(*strs))

class Solution {
    public int minDeletionSize(String[] strs) {
        int n = strs.length, m = strs[0].length();
        int ans = 0;
        for (int j = 0; j < m; ++j) {
            for (int i = 1; i < n; ++i) {
                if (strs[i-1].charAt(j) > strs[i].charAt(j)) {
                    ans++;
                    break;
                }
            }
        }
        return ans;
    }
}