#1771Medium#29 in Flipkart's list· asked at 15 companies
Sort Characters by Frequency
Hosted on LeetCode
Solve it on LeetCode, track it here.
This problem's full statement lives on LeetCode. Open it in a new tab, then come back to mark it solved, add notes and keep your streak.
LeetCode Premium locked?
Most company-tagged LeetCode problems are behind Premium. If you have ChatGPT Plus or Claude Pro, ask it for the full statement, examples and constraints. The buttons below open a chat with the prompt already filled in.
What we know
Example 1
Input: s = "tree" Output: "eert"
"eetr" is also valid.
Example 2
Input: s = "cccaaa" Output: "aaaccc"
Example 3
Input: s = "Aabb" Output: "bbAa"
Constraints
- •
1 <= s.length <= 5 * 10^5 - •
sconsists of uppercase and lowercase English letters and digits.