import java .util.Scanner;
  class Rp1ABC091A {
    public static void main(String[] args){
    Scanner stdIn=new Scanner(System.in);
    int A=stdIn.nextInt();
    int B=stdIn.nextInt();
    int C=stdIn.nextInt();
    if(C <= A+B){
    System.out.print("Yes");
    System.out.println();
  }
    else{
    System.out.print("No");
    System.out.println();
  }
}
}