#include <bits/stdc++.h>
using namespace std;
using ll = long long;
using P = pair<int, int>;
int main() {
  int a, b, c;
  cin >> a >> b >> c;
  if ((a + b) <= c) {
    puts("Yes");
    return 0;
  }
  puts("No");
  return 0;
}
