#include <bits/stdc++.h>
using namespace std;
#define rep(i, n) for (int i = 0; i < (int)(n); i++)
using ll = long long;
using P = pair<int,string>;

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