#include <iostream>

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