You are given a string s and an integer k, a k duplicate removal consists of choosing k adjacent and equal letters from s and removing them, causing the left and the right side of the deleted substring to concatenate together.
We repeatedly make k duplicate removals on s until we no longer can.
Return the final string after all such duplicate removals have been made. It is guaranteed that the answer is unique.
Examples
Example 1
Input: s = "abcd", k = 2
Output: "abcd"
Explanation: There's nothing to delete.
Example 2
Input: s = "deeedbbcccbdaa", k = 3
Output: "aa"
Explanation:
First delete "eee" and "ccc", get "ddbbbdaa"
Then delete "bbb", get "dddaa"
Finally delete "ddd", get "aa"
Example 3
Input: s = "pbbcggttciiippooaais", k = 2
Output: "ps"
Constraints
1 <= s.length <= 105
2 <= k <= 104
s only contains lowercase English letters.
1209. Remove All Adjacent Duplicates in String II
Medium
30 Points
String
Stack
You are given a string s and an integer k, a k duplicate removal consists of choosing k adjacent and equal letters from s and removing them, causing the left and the right side of the deleted substring to concatenate together.
We repeatedly make k duplicate removals on s until we no longer can.
Return the final string after all such duplicate removals have been made. It is guaranteed that the answer is unique.
Examples
Example 1
Input: s = "abcd", k = 2
Output: "abcd"
Explanation: There's nothing to delete.
Example 2
Input: s = "deeedbbcccbdaa", k = 3
Output: "aa"
Explanation:
First delete "eee" and "ccc", get "ddbbbdaa"
Then delete "bbb", get "dddaa"
Finally delete "ddd", get "aa"
Example 3
Input: s = "pbbcggttciiippooaais", k = 2
Output: "ps"
Constraints
1 <= s.length <= 105
2 <= k <= 104
s only contains lowercase English letters.
Remove All Adjacent Duplicates in String II - Practice Coding | SlaveCode