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

void fast_io() {
    ios_base::sync_with_stdio(false);
    cin.tie(nullptr);
}

int main() {
    fast_io();
    int s, t;
    char c;
    cin >> s >> t >> c;
    char d = (s < t ? '<' : (s > t ? '>' : '='));
    cout << (c == d ? "YES\n" : "NO\n");
}