//TwoCoins.java
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("No");
        }
        else{
            System.out.println("Yes");
        }
        sc.close();
    }
}