Package g0901_1000.s0960_delete_columns_to_make_sorted_iii

Class Solution

java.lang.Object
g0901_1000.s0960_delete_columns_to_make_sorted_iii.Solution
public class Solution extends java.lang.Object
960 - Delete Columns to Make Sorted III.

Hard

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

We may choose any deletion indices, and we delete all the characters in those indices for each string.

For example, if we have strs = ["abcdef","uvwxyz"] and deletion indices {0, 2, 3}, then the final array after deletions is ["bef", "vyz"].

Suppose we chose a set of deletion indices answer such that after deletions, the final array has every string (row) in lexicographic order. (i.e., (strs[0][0] <= strs[0][1] <= ... <= strs[0][strs[0].length - 1]), and (strs[1][0] <= strs[1][1] <= ... <= strs[1][strs[1].length - 1]), and so on). Return the minimum possible value of answer.length.

Example 1:

Input: strs = [“babca”,“bbazb”]

Output: 3

Explanation: After deleting columns 0, 1, and 4, the final array is strs = [“bc”, “az”]. Both these rows are individually in lexicographic order (ie. strs[0][0] <= strs[0][1] and strs[1][0] <= strs[1][1]). Note that strs[0] > strs[1] - the array strs is not necessarily in lexicographic order.

Example 2:

Input: strs = [“edcba”]

Output: 4

Explanation: If we delete less than 4 columns, the only row will not be lexicographically sorted.

Example 3:

Input: strs = [“ghi”,“def”,“abc”]

Output: 0

Explanation: All rows are already lexicographically sorted.

Constraints:

  • n == strs.length
  • 1 <= n <= 100
  • 1 <= strs[i].length <= 100
  • 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)