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");
    }
}