Multiples of 3 and 5

main.rs

fn get_num() -> u64 {
    let mut input = String::new();
    match std::io::stdin().read_line(&mut input) {
        Ok(_n) => match input.trim().parse::<u64>() {
            Ok(n) => n,
            Err(_error) => 0,
        },
        Err(_error) => 0,
    }
}

fn main() {
    for num in (0..get_num())
        .map(|_x| get_num())
        .collect::<Vec<u64>>()
        .into_iter()
        .map(|n| {
            (3..n)
                .filter(|&x| x % 3 == 0 || x % 5 == 0)
                .fold(0, |sum, x| sum + x)
        })
        .filter(|&x| x > 0)
    {
        println!("{}", num);
    }
}