[Level 2] 짝지어 제거하기

import java.util.*;

class Solution {
    public int solution(String s) {
        Stack<Character> stack = new Stack<>();
        
        for(int i=0; i<s.length(); i++) {
            if(!stack.isEmpty() && stack.peek()==s.charAt(i)) {
                stack.pop();
                continue;
            }
            
            stack.push(s.charAt(i));
        }
        
        return stack.isEmpty() ? 1 : 0;
    }
}