#include <iostream>
#include "Marwan.h"
using namespace std;

int main()
{
  int A,B,C,Sum;
  cin >> A >> B >> C;
Sum = A+B;
  if (Sum >= C){
    cout << "Yes" << endl;
  } else {
   cout << "No" << endl;
  }


    return 0;
}



