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

int main() {
    int S, T; char c; 
    cin >> S >> T >> c;
    bool work = true;
    if(S < T) {
        work &= (c == '<');
    }
    else if(S > T) {
        work &= (c == '>');
    }
    else {
        work &= (c == '=');
    }
    if(work) cout << "YES" << "\n";
    else cout << "NO" << "\n";
}