#include<bits/stdc++.h>
#include<stdio.h>
#include<vector>
#include<algorithm>
#include<string>
#include<iostream>
#include<queue>
#define rep(i,n) for(int i=0;i<(int)(n);i++)
#define rep1(i,n) for(int i=1;i<=(int)(n);i++)
#define pb push_back
using namespace std;
typedef pair<int, int>pii;

int main(){
	int a,b,c;
	cin >> a >> b >>c;
	if(a+b>=c) cotu <<"Yes"<<endl;
	else cout <<"No"<<endl;
	return 0;
}
	