/* package whatever; // don't place package name! */

import java.util.*;
import java.lang.*;
import java.io.*;

/* Name of the class has to be "Main" only if the class is public. */
class Main
{
	public static void main (String[] args) throws java.lang.Exception
	{
		Scanner sc = new Scanner(System.in);

}		int a = sc.nextInt(), b = sc.nextInt(),c = sc.nextInt();
		
            if(a+b >= c){
            	System.out.println("Yes");
            
            	}
           else{
           	       System.out.println("No");
           }
	}