MediumNo. 1702
Maximum Binary String After Change — LeetCode 1702 Python Solution
- Pattern
- Greedy
- Topics
- Greedy, String
- Reading time
- 2 min
- Source
- leetcode.com
The problem
You are given a binary string binary consisting of only 0's or 1's. You can apply each of the following operations any number of times: Operation 1: If the number contains the substring "00", you can replace it with "10".
Example
- Input
- binary = "000110"
- Output
- "111011"
- Explanation
- A valid transformation sequence can be:
Python solution
class Solution:
def maximumBinaryString(self, binary: str) -> str:
k = binary.find('0')
if k == -1:
return binary
k += binary[k + 1 :].count('0')
return '1' * k + '0' + '1' * (len(binary) - k - 1)Complexity
- Time
- O(n)
- Space · auxiliary
- O(n)
Pattern: Greedy
Take the locally best option every time — when you can prove that never costs you later. LeetCode 1702. Maximum Binary String After Change is filed here on both counts: the reference solution below belongs to the algorithm family this hub collects, and LeetCode tags it Greedy.
The greedy guide has the Python template for the pattern and the 346 LeetCode problems that use it.
Related problems
| No. | Problem | Difficulty |
|---|---|---|
| 0179 | Largest Number | Medium |
| 0316 | Remove Duplicate Letters | Medium |
| 0402 | Remove K Digits | Medium |
| 0420 | Strong Password Checker | Hard |
| 0649 | Dota2 Senate | Medium |
| 0680 | Valid Palindrome II | Easy |
Frequently asked questions
- How hard is LeetCode 1702. Maximum Binary String After Change?
LeetCode 1702. Maximum Binary String After Change is rated Medium on LeetCode.
- What is the time complexity of LeetCode 1702. Maximum Binary String After Change?
The Python solution on this page runs in O(n).
- What is the space complexity of LeetCode 1702. Maximum Binary String After Change?
The Python solution on this page uses O(n) auxiliary space.
- What topics does LeetCode 1702. Maximum Binary String After Change cover?
LeetCode 1702. Maximum Binary String After Change is tagged Greedy and String on LeetCode.