#include <bits/stdc++.h>
using namespace std;
string ALP = "ABCDEFGHIJKLMNOPQRSTUVWXYZ";
string alp = "abcdefghijklmnopqrstuvwxyz";
vector<int> d1 = {1, 0, -1, 0}, d2 = {0, 1, 0, -1};
void Yes() { cout << "Yes" << endl; }
void No() { cout << "No" << endl; }
void YES() { cout << "YES" << endl; }
void NO() { cout << "NO" << endl; }
void neg() { cout << -1 << endl; }
int main() {
  int a, b, c;
  cin >> a >> b >> c;
  if (a + b <= c)
    Yes();
  else
    No();
}
