#include <iostream>
#include <vector>
#include <string>
#include <algorithm>
#include <cstdio>
#include <cstdlib>
#include <cstring>
#include <cmath>
using namespace std;
using ll = long long;

int main() {
    int n, m, x;
    cin >> n >> m >> x;

    cout << ((x + m - n >= 3) ? "YES" : "NO") << endl;

    return 0;
}