//بِسْمِ ٱللَّٰهِ ٱلرَّحْمَٰنِ ٱلرَّحِيمِ
#include <bits/stdc++.h>

using namespace std;

typedef long long ll;
typedef unsigned long long ull;
typedef long double ld;
typedef double db;

#define endl "\n"

const int MOD = 1000000007;


int main()
{
    ios::sync_with_stdio(0);cin.tie(0);
    
       int a,b,c;
       cin>>a>>b>>c;
       if(a+b>c)cout<<"Yes"<<endl;
       else cout<<"No"<<endl;

    
    return 0;
}
