题解 | #统计大写字母个数#

use std::io;

fn main() {
    let mut s = String::new();
    io::stdin().read_line(&mut s).unwrap();
    let mut count = 0u8;
    for &i in s.as_bytes() {
        if i >= 65 && i <= 90 {
            count += 1;
        }
    }
    println!("{}", count);
}