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");
    }

  }
}