use std::io::*;

fn main() {
    let mut s: String = String::new();
    std::io::stdin().read_to_string(&mut s).ok();
    let mut itr = s.trim().split_whitespace();
    let n: u64 = itr.next().unwrap().parse().unwrap();

    let mut l = 0;
    let mut r = 1u64 << 31;
    while r - l > 1 {
        let mid = (l + r) >> 1;
        if mid * (mid + 1) / 2 <= n {
            l = mid;
        } else {
            r = mid;
        }
    }
    if l * (l + 1) / 2 == n {
        println!("YES");
        println!("{}", l);
    } else {
        println!("NO");
    }
}