#include <bits/stdc++.h>
using namespace std;
#ifdef LOCAL
  #include "settings/debug.cpp"
  #define _GLIBCXX_DEBUG
#else
  #define Debug(...) void(0)
#endif
using ll = long long;
#define rep(i, n) for (int i = 0; i < (n); ++i)

int main() {
  int s, t;
  char c;
  cin >> s >> t >> c;
  bool ans = false;
  switch (c) {
    case '<':
      ans = s < t;
      break;
    case '>':
      ans = s > t;
      break;
    default:
      ans = s == t;
      break;
  }
  cout << (ans ? "YES" : "NO") << endl;
  return 0;
}