#include <bits/stdc++.h>
#include <iostream>
using namespace std;
#define rep(i, n) for(int i = 0; i < (int)(n); i++)

int main() {
    int a, b, c;
    cin >> a >> b >> c;

    if (a + b >= c)
    cout << "Yes" << endl;
    else cout << No;
    return 0;
}