import java.util.Scanner;

class Rp1ABC091A {
   public static void main(String args[]) {
     int A;
     int B;
     int C;
     Scanner sc = new Scanner(System.in);

     System.err.print("A:");
     A = sc.nextInt();

     System.err.print("B:");
     B = sc.nextInt();

     System.err.print("C:");
     C = sc.nextInt();

     if (A + B >= C)
        System.out.println("Yes");
     else
        System.out.println("No");


   }
 }
