akjfal

import java.util.Stack; class Solution{ public int solution(String s){ int answer = 1; int length = s.length(); Stack stack = new Stack(); stack.push(s.charAt(0)); int idx = 1; while(idx < length){ char alpha = s.charAt(idx); if(stack.isEmpty()){ stack.push(alpha); }else if(alpha == stack.peek()){ stack.pop(); }else{ stack.push(alpha); } idx++; } if(!stack.isEmpty()) answer = 0; return answer; }..