#include<stdio.h>
int main()
{
char ch;
scanf("%c",&ch);
printf("%d",ch);
}
use std::io::{self, *};
fn main() {
let stdin = io::stdin();
let mut s = String::new();
stdin.read_line(&mut s).unwrap();
println!(
"{}",
s.trim().chars().next().unwrap() as u32
)
} 逐渐unwrap化