import java.util.Scanner;

class Main {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int N = sc.nextInt(), M = sc.nextInt(), X = sc.nextInt();
        sc.close();
        if (3 > X - N + M) System.out.print("NO");
        else System.out.print("YES");
    }
}