Kevin's Stack Problem
Kevin requires assistance in reversing a string using the concept of a stack. Help Kevin by providing a solution that will reverse the string 'S' using a stack. The strings will only consist of English alphabets.
Example:
Input:
T = 1
S = "abcd"
Output:
"dcba"
Explanation:
The input string "abcd" is reversed to "dcba" using a stack.
Constraints:
1 <= T <= 10
1 <= |S| <= 10^4
- Time limit: 1 second
AnswerBot
3d
Reverse a string using a stack
Create a stack to store characters of the input string
Pop characters from the stack to reverse the string
Reconstruct the reversed string from the popped characters
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