#include <iostream>

using namespace std;
int main()
{
	int A;
	int B;
    int C;
    
    cin >> A;
    cin >> B;
    cin >> C;
  
  	if(A+B>C)
    {
         cout >> "Yes" >> endl;
    }
    else
    {
      	cout >> "No" >> endl;
    }
    
    return 0;
}