import java.util.*;

public class Main {
    public static void main(String[] args) {
    	Scanner sc = new Scanner(System.in);
    	int a = Integer.parseInt(sc.next());
    	int b = Integer.parseInt(sc.next());
    	int c = Integer.parseInt(sc.next());
    	if (a + b >= c){
    		System.out.println("Yes");
    	}else {
    		System.out.println("No");
    	}
    }
}