Package g1601_1700.s1653_minimum_deletions_to_make_string_balanced

Class Solution

java.lang.Object
g1601_1700.s1653_minimum_deletions_to_make_string_balanced.Solution
public class Solution extends java.lang.Object
1653 - Minimum Deletions to Make String Balanced.

Medium

You are given a string s consisting only of characters 'a' and 'b'.

You can delete any number of characters in s to make s balanced. s is balanced if there is no pair of indices (i,j) such that i < j and s[i] = 'b' and s[j]= 'a'.

Return the minimum number of deletions needed to make s balanced.

Example 1:

Input: s = “aababbab”

Output: 2

Explanation: You can either:

Delete the characters at 0-indexed positions 2 and 6 (“aababbab” -> “aaabbb”), or

Delete the characters at 0-indexed positions 3 and 6 (“aababbab” -> “aabbbb”).

Example 2:

Input: s = “bbaaaaabb”

Output: 2

Explanation: The only solution is to delete the first two characters.

Constraints:

  • 1 <= s.length <= 105
  • s[i] is 'a' or 'b'.

  • Constructor Summary

    Constructors
    Constructor
    Description
    Solution()
     

  • Method Summary

    Modifier and Type
    Method
    Description
    int
    minimumDeletions(java.lang.String s)
     

    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

    • minimumDeletions

      public int minimumDeletions(java.lang.String s)