Submission #3810693

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Source Code Expand

use std::collections::HashSet;

fn main() {
    let mut set = HashSet::<i32>::new();

    let n = read::<i32>();
    for _ in 0..n {
        set.insert(read::<i32>());
    }

    println!("{}", set.len());
}

#[allow(dead_code)]
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()
}

#[allow(dead_code)]
fn read_vec<T: std::str::FromStr>() -> Vec<T> {
    let mut s = String::new();
    std::io::stdin().read_line(&mut s).ok();
    s.trim().split_whitespace()
        .map(|e| e.parse().ok().unwrap()).collect()
}

Submission Info

Judge Result