#include<iostream>
#include <bits/stdc++.h>
#include <string>
#include <cstring>
#include <algorithm>
using namespace std;


int main() {
    int a,b,c ;
    cin >> a >> b >> c  ;
  
    if(a+B >= c)
      cout << "Yes" ;
    else
      cout << "No" ;
      
    cout << endl ;
    

	return 0;
}

