Package g0901_1000.s0944_delete_columns_to_make_sorted

Class Solution

java.lang.Object
g0901_1000.s0944_delete_columns_to_make_sorted.Solution
public class Solution extends java.lang.Object
944 - Delete Columns to Make Sorted.

Easy

You are given an array of n strings strs, all of the same length.

The strings can be arranged such that there is one on each line, making a grid. For example, strs = ["abc", "bce", "cae"] can be arranged as:

 abc
 bce
 cae

You want to delete the columns that are not sorted lexicographically. In the above example (0-indexed), columns 0 ('a', 'b', 'c') and 2 ('c', 'e', 'e') are sorted while column 1 ('b', 'c', 'a') is not, so you would delete column 1.

Return the number of columns that you will delete.

Example 1:

Input: strs = [“cba”,“daf”,“ghi”]

Output: 1

Explanation: The grid looks as follows:

 cba 
 daf 
 ghi

Columns 0 and 2 are sorted, but column 1 is not, so you only need to delete 1 column.

Example 2:

Input: strs = [“a”,“b”]

Output: 0

Explanation: The grid looks as follows:

 a 
 b

Column 0 is the only column and is sorted, so you will not delete any columns.

Example 3:

Input: strs = [“zyx”,“wvu”,“tsr”]

Output: 3

Explanation: The grid looks as follows:

 zyx 
 wvu 
 tsr

All 3 columns are not sorted, so you will delete all 3.

Constraints:

  • n == strs.length
  • 1 <= n <= 100
  • 1 <= strs[i].length <= 1000
  • strs[i] consists of lowercase English letters.

  • Constructor Summary

    Constructors
    Constructor
    Description
    Solution()
     

  • Method Summary

    Modifier and Type
    Method
    Description
    int
    minDeletionSize(java.lang.String[] strs)
     

    Methods inherited from class java.lang.Object

    clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

  • Constructor Details

    • Solution

      public Solution()

  • Method Details

    • minDeletionSize

      public int minDeletionSize(java.lang.String[] strs)