#include <iostream>

using namespace std;

int main()
{
    int A,B,C;
    cin >> A >> B >> C;
    if (A+B>=C){
        cout << "Yes";
    }
    else if (A+B<C){
        cout << "No";19 123 14319 123 14319 123 143
    }
    return 0;
}
