import java.util.Scanner;
 
public class Main{
    public static void main(String[] args){
        Scanner sc = new Scanner(System.in);
        
        int A = sc.nextInt();
        int B = sc.nextInt();
        int C = sc.nextInt();
        
        if(A + B >= C){
            System.out.println("Yes");
        }else if(A + B < C){
            System.out.println("No");
        }
    }
}