[编程题] 制造回文分析代码

import java.util.*;



public class Main {

    
    public static void main(String[] args) {
        Scanner in = new Scanner(System.in);
        
        String s = in.nextLine();
        
        in.close();
        
        System.out.println(helper(s));
        
    }
    
    private static int helper(String s) {
        int[] count = new int[26];
        int ans = 0;
        for(int i=0;i<s.length();i++) {
            int j = s.charAt(i) - 'a';
            count[j]++;
        }
        
        for(int i=0;i<count.length;i++) {
            if(count[i] % 2 != 0)
                ans++;
        }
        
        return (ans == 0)?1:ans;
    }
}