#include <iostream>
#include <algorithm>
#include <math.h>
#include <string>
using namespace std;
int main(){
int A,B,C;
int cou = 0;
cin >> A >> B >> C;
bool cou = true;
if(A+B > C)cou = false;
if(cou)cout << "Yes" << endl;
else cout << "No" << endl;
        return 0;
}