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