import java.util.*;

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{
    System.out.println("No");
    }
}
}