#include <bits/stdc++.h>
#include REP(i,n) for(int i=0;i<n;i++)
using namespace std;
int main(){
  int a,b,c;
  cin>>a>>b>>c;
  if(a+b>=c){
    cout<<"Yes"<<endl;
  }else{
    cout<<"No"<<endl;
  }
  return 0;
}