1165. Single-Row Keyboard

There is a special keyboard with all keys in a single row .

Given a string keyboard of length 26 indicating the layout of the keyboard (indexed from 0 to 25), initially your finger is at index 0. To type a character, you have to move your finger to the index of the desired character. The time taken to move your finger from index i to index j is |i - j| .

You want to type a string word . Write a function to calculate how much time it takes to type it with one finger.

 

Example 1:

Input:

 keyboard = "abcdefghijklmnopqrstuvwxyz", word = "cba"
Output:

 4
Explanation: 

The index moves from 0 to 2 to write 'c' then to 1 to write 'b' then to 0 again to write 'a'.
Total time = 2 + 1 + 1 = 4. 

Example 2:

Input:

 keyboard = "pqrstuvwxyzabcdefghijklmno", word = "leetcode"
Output:

 73

 

Constraints:

• keyboard.length == 26
• keyboard contains each English lowercase letter exactly once in some order.
• 1 <= word.length <= 10^4
• word[i]  is an English lowercase letter.