Module a

Expand description

ยงABC 402 A - CBC

refs: https://atcoder.jp/contests/abc402/tasks/abc402_a

use proconio::input;

fn main() {
    input! {
        s: String
    }

    println!(
        "{}",
        s.chars().filter(|&c| c.is_uppercase()).collect::<String>()
    );
}