import java.util.* ;
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");
    }
  	
  }
}
