import java.util.Scanner;

public class T04 {
    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");
	}
    }
}
	
