#include <iostream>
using namespace std;

int main()
{
  int S, T;
  char C;
  cin >> S >> T >> C;
  
  if(C == '<')
  {
    if(S < T) cout << "YES" << endl;
    else cout << "NO" << endl;
  }
  else if(C == '=')
  {
    if(S == T) cout << "YES" << endl;
    else cout << "NO" << endl;
  }
  else
  {
    if(S > T) cout << "YES" << endl;
    else cout << "NO" << endl;
  }
  return 0;
}