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.print("Yes");
  }else{
  	System.out.print("No");
  }
}
}