#include <iostream>
#include <cassert>
using namespace std;

int main() {
	int N;
	cin >> N;
	assert(1 <= N && N <= 999);
	if (10 <= N && N <= 99) {
		cout << "Yes" << endl;
	}
	else {
		cout << "No" << endl;
	}
	return 0;
}