#include<iostream>
#include<vector>
#include<algorithm>

using namespace std;
using ll = long long;


int main(){
    cin.tie(nullptr);
    ios::sync_with_stdio(false);

    int s,t;
    cin>>s>>t;
    char c;
    cin>>c;
    if(c=='<'){
        if(s<t) cout<<"YES\n";
        else cout<<"NO\n";
    }else if(c=='>'){
        if(s>t) cout<<"YES\n";
        else cout<<"NO\n";
    }else{
        if(s==t) cout<<"YES\n";
        else cout<<"NO\n";
    }
}