#include <iostream>
#include <string>
#include <algorithm>
#include <utility>
#include <iomanip>
#include <functional>
#include <queue>
#include <stack>
#include <cmath>
#define INF 100000000
#define MOD 1000000007
using namespace std;
int main (){
  int a,b,c;
  cin>>a>>b>>c;
  if(a+b>=c) {cout<<"Yes"<<endl};
  ever{cout<<"No"<<endl};
}       
       