#include <bits/stdc++.h>
using namespace std;
using ll = long long;
int main() {
	int a, b, c;
	cin >> a >> b >> c;
	if ((b == 1) || (c == 1)) {
		cout << "Yes" << endl;
	}
	else if (b == c) {
		cout << "Yes" << endl;
	}
	else {
		cout << "No" << endl;
	}
}