#include <iostream>
#include <string>
#include <math.h>

using namespace std;

int main() {
    int t1 , t2 , t3 ;
    cin >> t1 >> t2 >> t3 ;
    if (t1 + t2 >= t3){
        cout << "Yes" ;
    }
    elsec{
        cout << "No" ;
    }
    return 0 ;
}
