Faulty Keyboard
You have a faulty keyboard that reverses the text whenever you type the letter ‘i’. You are given a string, and you need to return the final string as it appears on the screen.
Approach:
- Initialize an empty string
result
that represents the current text on the screen. - Iterate through the given string
s
, character by character. - If the current character is ‘i’, reverse the
result
string. - Otherwise, append the current character to the
result
. - Continue until you’ve processed all characters in the input string
s
. - Return the
result
as the final answer.
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Insights:
- The problem provides an interesting twist with the faulty ‘i’ key, leading to an intermediate reversal in the string.
- The solution leverages simple string manipulation, reversing and appending operations.
- The time complexity of the solution is O(n^2), where n is the length of the input string. The reversal takes O(n) time, and since we reverse n times in the worst case, the overall complexity is O(n^2).
- We can optimize the solution by using a stack or deque to achieve O(n) time complexity. But for a beginner’s level understanding, the given approach suffices.