#include <bits/stdc++.h>
using namespace std;
int popcount(unsigned int x) {
  x -= x >> 1 & 0x55555555;
  x = (x & 0x33333333) + (x >> 2 & 0x33333333);
  x = x + (x >> 4) & 0x0F0F0F0F;
  return x * 0x01010101 >> 24;
}
int tzcnt(unsigned int x) { return popcount(~x & x - 1); }
struct Point {
  int x, y;
  Point(int p, int q) : x(p), y(q) {}
};
long long ans[100];
int main() {
  cin.tie(0);
  ios::sync_with_stdio(false);
  int a, b, c;
  cin >> a >> b >> c;
  cout << (a + b > c ? "Yes" : "No") << "\n";
  int aaa;
  cin >> aaa;
}
