#include <bits/stdc++.h>
using namespace std;
void boost() {
  ios_base::sync_with_stdio(false);
  cin.tie(NULL);
}
void free() {
  freopen("A.in", "r", stdin);
  freopen("A.out", "w", stdout);
}
int main() {
  boost();
  int a, b, c;
  cin >> a >> b >> c;
  if (a + b > c)
    cout << "Yes";
  else
    cout << "No";
  exit(0);
}
