1 extern crate unicode_segmentation;
2 
3 use std::error::Error;
4 use std::io::{self, BufRead};
5 
6 use unicode_segmentation::UnicodeSegmentation;
7 
main() -> Result<(), Box<dyn Error>>8 fn main() -> Result<(), Box<dyn Error>> {
9     let stdin = io::stdin();
10     let mut stdin = stdin.lock();
11 
12     let mut words = 0;
13     let mut line = String::new();
14     while stdin.read_line(&mut line)? > 0 {
15         words += line.unicode_words().count();
16         line.clear();
17     }
18     println!("{}", words);
19     Ok(())
20 }
21