import java.util.*;

public class Main {
    public static void main(String[] args) throws Exception {

        Scanner sc = new Scanner(System.in);
        
        int A = sc.nextInt();
        int B = sc.nextInt();
        int C = sc.nextInt();
        int sum = A + B;
        
        System.out.println(sum - C >= 0 ? "Yes" : "No");
    }
}
 