Number of Lines To Write String

lcpy gen -n 806   # by problem number
lcpy gen -s number_of_lines_to_write_string   # by problem name

Input: widths = [10,10,10,10,10,10,10,10,10,10,10,10,10,10,10,10,10,10,10,10,10,10,10,10,10,10], s = "abcdefghijklmnopqrstuvwxyz"
Output: [3,60]
Explanation: You can write s as follows:
abcdefghij  // 100 pixels wide
klmnopqrst  // 100 pixels wide
uvwxyz      // 60 pixels wide
There are a total of 3 lines, and the last line is 60 pixels wide.

Input: widths = [4,10,10,10,10,10,10,10,10,10,10,10,10,10,10,10,10,10,10,10,10,10,10,10,10,10], s = "bbbcccdddaaa"
Output: [2,4]
Explanation: You can write s as follows:
bbbcccdddaa  // 98 pixels wide
a            // 4 pixels wide
There are a total of 2 lines, and the last line is 4 pixels wide.

class Solution:
    # Time: O(len(s))
    # Space: O(1)
    def number_of_lines(self, widths: list[int], s: str) -> list[int]:
        lines = 1
        used = 0
        for ch in s:
            w = widths[ord(ch) - ord("a")]
            if used + w > 100:
                lines += 1
                used = w
            else:
                used += w
        return [lines, used]