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)