import java.util.*;

public class Main {
    

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