#include <iostream>
#include <cassert>

using namespace std;

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

  int S, T; char c; cin >> S >> T >> c;
  bool correct;
  if (c == '<') correct = S < T;
  else if (c == '>') correct = S > T;
  else correct = S == T;
  cout << (correct? "YES" : "NO") << endl;
  return 0;
}