【寒武纪】最佳配对

很简单，加入HashSet来进行判断

'''

class Solution {

    public boolean validPalindrome(String s) {

        int start=0;

        int end=s.length()-1;

        while(start<end){

            if(s.charAt(start)==s.charAt(end)){

                start++;

                end--;

            }else{

                return panduan(start,end-1,s)||panduan(start+1,end,s);

            }

        }

        return true;

    }

    public boolean panduan(int left,int right,String s){

        while(left<right){

            if(s.charAt(left)==s.charAt(right)){

                left++;

                right--;

            }else{

                return false;

            }

        }

        return true;

    }

}

'''