#![allow(non_snake_case, unused_imports)]

use std::collections::{BinaryHeap, HashMap, HashSet};
use proconio::{input, marker::Usize1, marker::Chars};
use itertools::Itertools;

#[allow(unused_macros)]
macro_rules! d {
    ( $( $x:expr ),* $(,)? ) => {
        eprintln!(
            concat!( $( stringify!($x), "={:?} " ),* ),
            $( $x ),*
        );
    };
}

#[allow(dead_code)]
fn yn(b: bool) -> &'static str {
    if b { "Yes" } else { "No" }
}

fn main() {
    input! {
        A: usize,
        B: usize,
        C: usize,
    }

    let mut v = vec![A, B, C];
    v.sort();
    let [a, b, c] = v[..] else { unreachable!() };


    println!("{}", yn(a+b > c));
}