#include <bits/stdc++.h>
using namespace std;
const double PI = 3.1415926535898;
const double E = 2.718281;
int main() {
  int a, b, c;
  cin >> a >> b >> c;
  if (a + b >= c)
    scanf("Yes\n");
  else
    scanf("No\n");
  return 0;
}
