use std::io;

/// Retrun unique characters count of a string.
fn uniq_chars_count(string: &str) -> usize {
    let string_vector: Vec<char> = string.chars().collect();
    let mut y = string_vector.clone();

    y.dedup();
    y.len()
}

fn main() -> io::Result<()> {
    let mut input = String::new();

    io::stdin().read_line(&mut input)?;

    let u_chars = uniq_chars_count(input.trim());

    println!("Unique char lenght: {}", u_chars );
    println!("Line length: {}", input.trim().len());
}

fn main(){
    ...
 }

use std::io;

/// Retrun tuple with total and unique characters count of a string.
fn uniq_chars_count(string: &str) -> (usize, usize) {
    let mut string_vector: Vec<char> = string.chars().collect();
    let t_chars = string_vector.len();
    string_vector.sort();
    string_vector.dedup();
    (t_chars, string_vector.len())
}

fn main() -> io::Result<()> {
    let mut input = String::new();
    while io::stdin.read_line(&mut input)? != 0 {
        let (t_chars, u_chars) = uniq_chars_count(input.trim());
        println!("Unique char lenght: {}", u_chars );
        println!("Line length: {}", t_chars);
        input.clear();
    }
    Ok(())
}

use std::collections::HashSet;

/// Retrun tuple with total and unique characters count of a string.
fn uniq_chars_count(string: &str) -> (usize, usize) {
    let mut t_chars = 0;
    let u_chars = string.chars().inspect(|_| t_chars+=1).collect::<HashSet<char>>().len();
    (t_chars, u_chars)
}