import java.util.Scanner;
public class Main {

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