import java.util.Scanner;

class Main{
    public static void main(String[] args){
	Scanner scan = new Scanner(System.in);
	int A = scan.nextInt();
	int B = scan.nextInt();
	int C = scan.nextInt();

	if(A+B >= C){
	    System.out.println("Yes");
	}else{
	    System.out.println("No");
	}
    }
}