#include <bits/stdc++.h>
using namespace std;
const int MX = 100005, INF = 1001001001;
const long long int LINF = 1e18;
const double eps = 1e-10;
const int DIV = 1e9 + 7;
int a, b, c;
int main() {
  cin >> a >> b >> c;
  if (a + b > c)
    puts("Yes");
  else
    puts("No");
}
