Lecture 152:- Remove All Adjacent Strings

It seems like you want to remove all adjacent duplicate characters (strings) from a given string. This is a common problem that can be solved using a stack.

Here's a C++ implementation to remove all adjacent duplicates from a string using a stack:

cppCopy code

#include <iostream> #include <stack> #include <string> std::string removeAdjacentDuplicates(const std::string& input) { std::stack<char> charStack; std::string result; for (char ch : input) { if (!charStack.empty() && charStack.top() == ch) { charStack.pop(); } else { charStack.push(ch); } } while (!charStack.empty()) { result = charStack.top() + result; charStack.pop(); } return result; } int main() { std::string input = "abbaca"; std::string result = removeAdjacentDuplicates(input); std::cout << "Original string: " << input << std::endl; std::cout << "String after removing adjacent duplicates: " << result << std::endl; return 0; }

In this example, the removeAdjacentDuplicates function takes a string as input and iterates through it character by character. It uses a stack to keep track of characters while removing adjacent duplicates. After the iteration, it constructs the final result by popping characters from the stack.

For the input "abbaca", the output will be "ca" since the adjacent duplicates 'b' and 'a' have been removed.

This approach has a time complexity of O(n), where n is the length of the input string, and a space complexity of O(n) due to the stack used for storage.