import java.util.*;
 
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();
      
      int x = a+b; 
      
      if(x>=c){
         System.out.print("Yes");
      }else{
        System.out.print("No");
      }

    }
}