848 - Shifting Letters.

Medium

You are given a string s of lowercase English letters and an integer array shifts of the same length.

Call the shift() of a letter, the next letter in the alphabet, (wrapping around so that 'z' becomes 'a').

• For example, shift('a') = 'b', shift('t') = 'u', and shift('z') = 'a'.

Now for each shifts[i] = x, we want to shift the first i + 1 letters of s, x times.

Return the final string after all such shifts to s are applied.

Example 1:

Input: s = "abc", shifts = 3,5,9

Output: "rpl"

Explanation: We start with "abc".

After shifting the first 1 letters of s by 3, we have "dbc".

After shifting the first 2 letters of s by 5, we have "igc".

After shifting the first 3 letters of s by 9, we have "rpl", the answer.

Example 2:

Input: s = "aaa", shifts = 1,2,3

Output: "gfd"

Constraints:

• <code>1 <= s.length <= 10⁵</code>

• s consists of lowercase English letters.

• shifts.length == s.length

• <code>0 <= shiftsi<= 10⁹</code>