#include<iostream>
#include<string>
#include<vector>
#include<algorithm>
using namespace std;
int main() {
	int s,t;
	char c;
	bool f = 0;
	cin >> s>>t>>c;
	if (c == '<') {
		if (s < t) f = 1;
	}
	else if (c == '>') {
		if (s > t) f = 1;
	}
	else if (c == '=') {
		if (s == t) f = 1;
	}

	if(f==1) cout << "YES" << endl;
	if (f == 0) cout << "NO" << endl;
	
	return 0;
}