Submission #59151073

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Source Code Expand

#![allow(unused)]

fn main() {
    let inp = readv::<u64>();
    let (a, b) = (inp[0], inp[1]);
    for x in (1..=b).rev() {
        if num_multiples_in(a, b, x) >= 2 {
            println!("{}", x);
            return;
        }
    }
}

fn num_multiples_in(a: u64, b: u64, m: u64) -> u64 {
    b / m - (a - 1) / m
}

fn read<T: std::str::FromStr>() -> T {
    let mut s = String::new();
    std::io::stdin().read_line(&mut s).ok();
    s.trim().parse().ok().unwrap()
}

fn readv<T: std::str::FromStr>() -> Vec<T> {
    read::<String>()
        .split_ascii_whitespace()
        .map(|t| t.parse().ok().unwrap())
        .collect()
}

fn reads() -> Vec<char> {
    read::<String>().chars().collect()
}

fn mapv<T, S, F: Fn(&T) -> S>(arr: &Vec<T>, f: F) -> Vec<S> {
    arr.iter().map(f).collect()
}

fn join<T: ToString>(arr: &[T], sep: &str) -> String {
    arr.iter()
        .map(|x| x.to_string())
        .collect::<Vec<String>>()
        .join(sep)
}

Submission Info

Judge Result