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This approach uses the sliding window technique to maintain a window of the answerKey where the number of modifications does not exceed k. We attempt to maximize the length of this window by evaluating either 'T' or 'F' transformations separately and then taking the maximum length between both transformations.
Time Complexity: O(n), where n is the length of the answerKey string. We traverse the string once.
Space Complexity: O(1), as we use constant space related to variables.
1#include <iostream>
2#include <string>
3using namespace std;
4
5int maxConsecutiveAnswers(string answerKey, int k) {
6 int left = 0, maxLen = 0, countT = 0, countF = 0;
7
8 for (int right = 0; right < answerKey.size(); ++right) {
9 answerKey[right] == 'T' ? countT++ : countF++;
10
11 while (min(countT, countF) > k) {
12 answerKey[left] == 'T' ? countT-- : countF--;
13 left++;
14 }
15
16 maxLen = max(maxLen, right - left + 1);
17 }
18 return maxLen;
19}
20
21int main() {
22 string answerKey = "TFFT";
23 int k = 1;
24 cout << maxConsecutiveAnswers(answerKey, k) << endl;
25 return 0;
26}The C++ solution uses two counts (countT and countF) to simulate the two-sided sliding window approach. As the window expands with right, the number of 'T' and 'F' are tracked. The window shrinks whenever the minimum of the two counts exceeds k.
In this approach, we utilize two pointers to explore the string sequence, adjusting pointers as we evaluate possibilities involving updates utilizing k. The purpose is to ensure the longest alteration window without exceeding k modifications. It proceeds by specifically examining alternate possibilities and then concluding with the optimal maximum length.
Time Complexity: O(n), based on the two-pointer traversal.
Space Complexity: O(1), engaging a minimal variable set, bypassing auxiliary data structures.
The Python variant distinctly analyzes answer conversions from separate character strains producing competitive responses at each tentative setting. Adjustments maintain plausible ranges to ensure altered strings sustain under k conversion restraint.