#include <algorithm>
#include<iostream>
#include<vector>
#include<string>

#include<stdlib.h>
#include<string.h>
#include<math.h>
#include<limits.h>

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;
}
