#include <bits/stdc++.h>
using namespace std;
int main(){
  int N;
  cin >> N;
  int a, b, c;
  cin >> a >> b >> c;
  c += N;
  if (a < b){
    if (c - a > N){
      cout << "Yes" << endl;
    } else {
      cout << "No" << endl;
    }
  } else {
    if (c - a < N){
      cout << "Yes" << endl;
    } else {
      cout << "No" << endl;
    }
  }
}