题解 | 小红的字符串

import java.util.Scanner;

// 注意类名必须为 Main, 不要有任何 package xxx 信息
public class Main {
    public static void main(String[] args) {
        Scanner in = new Scanner(System.in);
        // 注意 hasNext 和 hasNextLine 的区别


        String str = in.next();
        char[] arr = str.toCharArray();
        int len = str.length();
        int count = 0;
        if (len <= 1) {
            System.out.println(0);
            return;
        }
        for (int i = 0 ; i < str.length() / 2; i++) {
            int ddddd = arr[len - 1 - i] - arr[i];
            if (ddddd >= 0) {
                count += Math.min(ddddd, 26 - ddddd);
            } else {
                count += Math.min(26 + ddddd, -ddddd);
            }
        }
        System.out.println(count);
    }
}