#include <bits/stdc++.h>
using namespace std;

int s, t;
char c;
bool f;

int main()
{
	cin >> s >> t >> c;

	if ((c == '<' && s < t) || (c == '>' && s > t) || (c == '=' && s == t))
		cout << "YES" << endl;
	else
		cout << "NO" << endl;
}