import java.util.Scanner;

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