#include <iostream>
#include <algorithm>
#include <vector>

int main(void){
	int k, n, m;

	std::cin >> k >> n >> m;

	if (m - (k - n) >= 3) {
		std::cout << "YES" << std::endl;
	}
	else {
		std::cout << "NO" << std::endl;
	}

	return 0;
}