#![allow(dead_code, deprecated, unused_variables, unused_mut)]
use std::fmt::Arguments;
fn write_str(_: &str) {}
fn write_fmt(args: &Arguments<'_>) {
    if let Some(s) = args.as_str() {
        write_str(s)
    } else {
        write_str(&args.to_string());
    }
}
fn main() {}