Crate proconio

proconio crate

Setup

% cargo add -F derive proconio

# Cargo.toml
proconio = { version = "=0.4.5", features = ["derive"] }

impl Readable

use std::io::BufRead;

use proconio::{
    fastout, input,
    marker::Usize1,
    source::{Readable, Source},
};

#[derive(Copy, Clone, Debug, Eq, PartialEq)]
enum Query {
    Q1(usize, char),
    Q2(usize, usize),
}
use Query::{Q1, Q2};

impl Readable for Query {
    type Output = Query;
    fn read<R: BufRead, S: Source<R>>(source: &mut S) -> Self::Output {
        match u32::read(source) {
            1 => {
                input! {
                    from source,
                    x: Usize1,
                    c: char,
                }
                Q1(x, c)
            }
            2 => {
                input! {
                    from source,
                    l: Usize1,
                    r: usize,
                }
                Q2(l, r)
            }
            _ => unreachable!(),
        }
    }
}

#[fastout]
fn main() {
    input! {

    }

    unimplemented!()
}