Package g1501_1600.s1544_make_the_string_great

Class Solution

java.lang.Object
g1501_1600.s1544_make_the_string_great.Solution
public class Solution extends java.lang.Object
1544 - Make The String Great.

Easy

Given a string s of lower and upper case English letters.

A good string is a string which doesn’t have two adjacent characters s[i] and s[i + 1] where:

  • 0 <= i <= s.length - 2
  • s[i] is a lower-case letter and s[i + 1] is the same letter but in upper-case or vice-versa.

To make the string good, you can choose two adjacent characters that make the string bad and remove them. You can keep doing this until the string becomes good.

Return the string after making it good. The answer is guaranteed to be unique under the given constraints.

Notice that an empty string is also good.

Example 1:

Input: s = “leEeetcode”

Output: “leetcode”

Explanation: In the first step, either you choose i = 1 or i = 2, both will result “leEeetcode” to be reduced to “leetcode”.

Example 2:

Input: s = “abBAcC”

Output: ""

Explanation: We have many possible scenarios, and all lead to the same answer. For example: “abBAcC” –> “aAcC” –> “cC” –> "" “abBAcC” –> “abBA” –> “aA” –> ""

Example 3:

Input: s = “s”

Output: “s”

Constraints:

  • 1 <= s.length <= 100
  • s contains only lower and upper case English letters.

  • Constructor Summary

    Constructors
    Constructor
    Description
    Solution()
     

  • Method Summary

    Modifier and Type
    Method
    Description
    java.lang.String
    makeGood(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

    • makeGood

      public java.lang.String makeGood(java.lang.String s)