import java.util.*;
import java.io.*;

public class A91 {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int a = Integer.parseInt(sc.next());
        int b = Integer.parseInt(sc.next());
        int c = Integer.parseInt(sc.next());
        
        if(a + b >= c){
            System.out.println("Yes");
        }else{
            System.out.println("No");
        }

        sc.close();
    }
}