Minimum Time to Type Word Using Special Typewriter

There is a special typewriter with lowercase English letters 'a' to 'z' arranged in a circle with a pointer. A character can only be typed if the pointer is pointing to that character. The pointer is initially pointing to the character 'a'.

Each second, you may perform one of the following operations:

• Move the pointer one character counterclockwise or clockwise.
• Type the character the pointer is currently on.

Given a string word, return the minimum number of seconds to type out the characters in word.

Example 1:

Input: word = "abc"
Output: 5
Explanation: 
The characters are printed as follows:
- Type the character 'a' in 1 second since the pointer is initially on 'a'.
- Move the pointer clockwise to 'b' in 1 second.
- Type the character 'b' in 1 second.
- Move the pointer clockwise to 'c' in 1 second.
- Type the character 'c' in 1 second.

思路：每个单词type需要1second，转动转盘需要1second，怎么转动，就是看Math.abs(diff), 26-diff的最小值；

class Solution {
    public int minTimeToType(String word) {
        int count = word.length();
        char pre = 'a';
        for(int i = 0; i < word.length(); i++) {
            char cur = word.charAt(i);
            int diff = Math.abs(cur - pre);
            diff = Math.min(diff, 26 - diff);
            count += diff;
            pre = cur;
        }
        return count;
    }
}