akjfal

import java.util.Stack; class Solution { boolean solution(String s) { int length = s.length(); Stack stack = new Stack(); if(s.charAt(0) ==')') return false; stack.push('('); int idx = 1; while(idx < length){ if(s.charAt(idx) == ')'){ if(stack.isEmpty()) return false; stack.pop(); }else{ stack.push('('); } idx++; } if(stack.isEmpty() && idx == length){ return true; }else{ return false; } } } sta..