Problem:
Score: 100 points

Problem Statement

A triple of numbers is said to be poor when two of those numbers are equal but the other number is different from those two numbers.

You will be given three integers A, B, and C. If this triple is poor, print Yes; otherwise, print No.

Constraints

A, B, and C are all integers between 1 and 9 (inclusive).

Input

Input is given from Standard Input in the following format:

A B C

Output

If the given triple is poor, print Yes; otherwise, print No.

Sample Input 1

5 7 5

Sample Output 1

Yes

A and C are equal, but B is different from those two numbers, so this triple is poor.

Sample Input 2

4 4 4

Sample Output 2

No

A, B, and C are all equal, so this triple is not poor.

Sample Input 3

4 9 6

Sample Output 3

No

Sample Input 4

3 3 4

Sample Output 4

Yes

Solution in Rust (1.15.1) (judge verdict: Accepted)

use std::io;
use std::str::FromStr;
use std::fmt;

fn read_line() -> String {
    let mut ret = String::new();
    io::stdin().read_line(&mut ret).expect("read_line failed");
    ret.trim().to_string()
}

fn read_one<F>() -> F where F: FromStr {
    // FromStr has type Error in its struct.
    // https://doc.rust-lang.org/std/str/trait.FromStr.html
    // String#parse return Result<F, F::Err>,
    // and unwrap is only available in Result<T, Result>
    match read_line().parse::<F>() {
        Ok(v)  => v,
        Err(_) => panic!("failed to parse.")
    }
}

fn read_many<F>() -> Vec<F> where F: FromStr {
    read_line().split(' ').map(
        |s| match s.parse::<F>() {
            Ok(v)  => v,
            Err(_) => panic!("failed to parse.")
        }
    ).collect()
}
// -----------------------------------------------------------------------------
// -----------------------------------------------------------------------------
fn main() {
    let mut abc = read_many::<u32>();
    abc.sort();

    let kawaisou = (abc[0] == abc[1] && abc[1] != abc[2]) ||
                   (abc[0] != abc[1] && abc[1] == abc[2]);

    println!("{}", if kawaisou { "Yes" } else { "No" });
}