#include <bits/stdc++.h>
using namespace std;
int main() {
  long long s , t;
  char c;
  cin >> s >> t >> c;
  if (c == '<') {
    cout <<  (s < t ? "YES" : "NO") << endl;
  } else if (c == '>') {
    cout <<  (s > t ? "YES" : "NO") << endl;
  } else if (c == '=') {
    cout <<  (s == t ? "YES" : "NO") << endl;
  }
  return 0;
}