package com.zmz.algorithm.stackQueue;

import java.util.Stack;

/**
 * @author 张明泽
 * Create by 2022/5/31 21:30
 * 删除字符串中的所有相邻重复项
 * LeetCode-1047
 */
public class DeleteRepeatString {
    public static void main(String[] args) {
        String str = "abbaca";
        String result = removeDuplicates(str);
        System.out.println(result);
    }
    public static String removeDuplicates(String str) {
        Stack<Character> stack = new Stack<>();
        for (char c : str.toCharArray()) {
            if (!stack.isEmpty() && c == stack.peek()) {
                stack.pop();
            } else {
                stack.push(c);
            }
        }
        StringBuffer stringBuffer = new StringBuffer();
        while (!stack.isEmpty()) {
            stringBuffer.append(stack.pop());
        }
        return stringBuffer.reverse().toString();
    }
}