#include<bits/stdc++.h> 
using namespace std;
int main()
{
	int n,a,b,c;
	cin>>n>>a>>b>>c;
	if(n>a+b+c){
		cout<<"YES";
	}else{
		cout<<"NO";
	}
	
    
}
/**************************************************************
	Problem: 1635
	User: yangjunwen
	Language: C++
	Result: Wrong Answer
****************************************************************/