#349Medium#40 in Wix's list· asked at 18 companies
Decode String
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 = "3[a]2[bc]" Output: "aaabcbc"
Example 2
Input: s = "3[a2[c]]" Output: "accaccacc"
Example 3
Input: s = "2[abc]3[cd]ef" Output: "abcabccdcdcdef"
Constraints
- •
1 <= s.length <= 30 - •
sconsists of lowercase English letters, digits, and square brackets '[]'. - •
All the integers in
sare in the range[1, 300].