Codeforces 376 Div 2

A.java

package codeforces.x376;

import java.util.Scanner;

/**
 * Created by ysharma on 10/16/16.
 */
public class A {

    public static void main(String[] args) {
        new A().doit();
    }

    private void doit(){
        Scanner sc = new Scanner(System.in);
        String name = sc.next();

        char last = 'a';
        int res = 0;

        for(char ch : name.toCharArray()){
            res += Math.min(Math.abs(last - ch), 26 - Math.abs(last - ch));
            last = ch;
        }

        System.out.println(res);

    }
}