"""
If the numbers 1 to 5 are written out in words: one, two, three, four, five,
then there are 3 + 3 + 5 + 4 + 4 = 19 letters used in total.

If all the numbers from 1 to 1000 inclusive were written out in words,
how many letters would be used?

总之感觉这个问题很傻……没什么可说的。
"""

key: dict[int, str] = {
    1: "one",
    2: "two",
    3: "three",
    4: "four",
    5: "five",
    6: "six",
    7: "seven",
    8: "eight",
    9: "nine",
    10: "ten",
    11: "eleven",
    12: "twelve",
    13: "thirteen",
    14: "fourteen",
    15: "fifteen",
    16: "sixteen",
    17: "seventeen",
    18: "eighteen",
    19: "nineteen",
    20: "twenty",
    30: "thirty",
    40: "forty",
    50: "fifty",
    60: "sixty",
    70: "seventy",
    80: "eighty",
    90: "ninety",
    100: "hundred",
    1000: "thousand",
}


def int_to_str(n: int) -> str:
    if n > 1000:
        return ""
    elif n in key:
        if n == 100:
            return key[1] + key[n]
        elif n == 1000:
            return key[1] + key[1000]
        else:
            return key[n]
    elif n < 100:
        return key[n - n % 10] + key[n % 10]
    elif n < 1000:
        return (
            key[n // 100]
            + key[100]
            + ("" if n % 100 == 0 else "and" + int_to_str(n % 100))
        )
    else:
        return ""


def main() -> None:
    print(sum(len(int_to_str(i)) for i in range(1, 1001)))


if __name__ == "__main__":
    main()