#include <iostream>
#include <vector>
#include <map>
#include <set>
#include <queue>
#include <string>
#include <iomanip>
#include <algorithm>
#include <cmath>
#include <stdio.h>
using namespace std;
#define int long long
int MOD = 1000000007;
signed main() {
	cin.tie(0);
	ios::sync_with_stdio(false);
	int N, M, X;
	cin >> N >> M >> X;
	if (X - (N - M) >= 3) {
		cout << "YES" << endl;
	}
	else {
		cout << "NO" << endl;
	}
}