2019/src/main.rs


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use std::io;
use std::io::prelude::*;

fn main() {
    let stdin = io::stdin();
    let answer = string_length_sum(stdin.lock().lines().map(|l| l.unwrap()));
    dbg!(answer);
}

fn string_length_sum(it: impl Iterator<Item = String>) -> usize {
    it.map(|l| l.len()).sum()
}