Ezvor

767. Reorganize String

MediumHash Table Preparing judge… LeetCode

Given a string s, rearrange the characters of s so that any two adjacent characters are not the same.

Return any possible rearrangement of s or return "" if not possible.

 

Example 1:

Input: s = "aab"
Output: "aba"

Example 2:

Input: s = "aaab"
Output: ""

 

Constraints:

  • 1 <= s.length <= 500
  • s consists of lowercase English letters.
Hash TableStringGreedySortingHeap (Priority Queue)Counting

Hints

Hint 1
Alternate placing the most common letters.