from typing import Tuple


def n_chars(n_chars_per_word: Tuple[int, ...]) -> int:
    """
    Compute the total number of characters in a document.

    Args:
        n_chars_per_word: Number of characters per word in a given document,
            as computed by :func:`n_chars_per_word()`.
    """
    return sum(n_chars_per_word)