#include<iostream>
using namespace std;
int main(){
	int s,t;
	char c;
	cin>>s>>t>>c;
	bool f;
	if(c=='<')
		f=s<t;
	else if(c=='>')
		f=s>t;
	else
		f=s==t;
	cout<<(f?"YES":"NO")<<endl;
}