#include <bits/stdc++.h>
using namespace std;
struct Fast {
  Fast() {
    std::cin.tie(0);
    ios::sync_with_stdio(false);
  }
} fast;
inline bool inside(int y, int x, int H, int W) {
  return y >= 0 && x >= 0 && y < H && x < W;
}
int gcd(int a, int b) { return b ? gcd(b, a % b) : a; }
int dx[4] = {1, 0, -1, 0};
int dy[4] = {0, 1, 0, -1};
const int MOD = 1e9 + 7;
const int INF = INT_MAX;
signed main() {
  Fast();
  int a, b, c;
  cin >> a >> b >> c;
  cout << (a + b <= c ? "Yes" : "No") << endl;
  return 0;
}
