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();
	    	double c= sc.nextInt();	
	    	if(a + b >= c) {
				System.out.println("Yes");
			}
	    	else {
	    		System.out.println("No");
	    	}
	    	
	    }
	}
