2116. Check if a Parentheses String Can Be Valid

class Solution {
    public boolean canBeValid(String s, String locked) {
        if(s.length()%2!=0) return false;
        Stack<Integer> unlocked = new Stack<>();
        Stack<Integer> open = new Stack<>();
        char[] stArray = s.toCharArray();
        char[] lArray = locked.toCharArray();

        for(int i=0;i<lArray.length;i++){
            if(lArray[i]=='0'){
                unlocked.push(i);
            }
            else if(stArray[i]=='('){
                open.push(i);
            }
            else{
                if(open.size()>0){
                    open.pop();
                }
                else if(unlocked.size()>0){
                    unlocked.pop();
                }
                else{
                    return false;
                }
            }
        }

        while(open.size()>0 && unlocked.size()>0 && open.peek()<unlocked.peek()){
            open.pop();
            unlocked.pop();
        }
        
        return open.size()==0;
    }
}