use std::io::Read;

fn main() {
    let (a, b, c) = {
        let mut buf = String::new();
        std::io::stdin().read_to_string(&mut buf).unwrap();
        let mut iter = buf.split_whitespace();
        let a: usize = iter.next().unwrap().parse().unwrap();
        let b: usize = iter.next().unwrap().parse().unwrap();
        let c: usize = iter.next().unwrap().parse().unwrap();
        (a, b, c)
    };
    if a+b == c || a+c == b || b+c == a {
        print!("YES");
    } else {
        print!("NO");
    }
}
