How do you solve Construct the Longest New String on LeetCode?

Construct the Longest New String (LeetCode #2745) can be solved using Brute Force. The optimal approach is Brute Force with Unknown time complexity and Unknown space complexity. Key insight: In the brute force approach, we can generate all possible combinations of the strings 'AA', 'BB', and 'AB', and check each combination to see if it violates the constraints of containing 'AAA' or 'BBB'. This method is straightforward but inefficient.

What is the time complexity of Construct the Longest New String?

The optimal solution for Construct the Longest New String runs in Unknown time and uses Unknown space.

What algorithm or data structure is used to solve Construct the Longest New String?

Construct the Longest New String uses the following concepts: Math, Dynamic Programming, Greedy, Brainteaser. The recommended patterns to study are: .

Construct the Longest New String — LeetCode #2745 (Medium)

Tags: Math, Dynamic Programming, Greedy, Brainteaser

Related patterns:

Brute Force approach

Time complexity: Unknown. Space complexity: Unknown.

In the brute force approach, we can generate all possible combinations of the strings 'AA', 'BB', and 'AB', and check each combination to see if it violates the constraints of containing 'AAA' or 'BBB'. This method is straightforward but inefficient.

Step 1: Generate all possible combinations of 'AA', 'BB', and 'AB'.
Step 2: For each combination, check if it contains 'AAA' or 'BBB'.
Step 3: Keep track of the maximum length of valid combinations.

#2745

Construct the Longest New String

Medium

Math↗Dynamic Programming↗Greedy↗Brainteaser↗

LeetCode ↗

Approaches

💡

Intuition

Time UnknownSpace Unknown

⚙️

Algorithm

3 steps

1Step 1: Generate all possible combinations of 'AA', 'BB', and 'AB'.
2Step 2: For each combination, check if it contains 'AAA' or 'BBB'.
3Step 3: Keep track of the maximum length of valid combinations.

solution.py11 lines

1# Full working Python code
2from itertools import permutations
3
4def max_length_brute_force(x, y, z):
5    strings = ['AA'] * x + ['BB'] * y + ['AB'] * z
6    max_length = 0
7    for perm in set(permutations(strings)):
8        combined = ''.join(perm)
9        if 'AAA' not in combined and 'BBB' not in combined:
10            max_length = max(max_length, len(combined))
11    return max_length

Solutions and explanations are original Tejav content. Problem titles © LeetCode — use the LeetCode button above for the full problem statement.