#include<bits/stdc++.h>
using namespace std;
using ll = long long;
#define fi first
#define se second
#define all(a) a.begin(),a.end()
int main(){
  int s,t;
  char c;
  cin >> s >> t >> c;
  if(c=='<') cout << (s<t ? "YES\n" : "NO\n");
  else if(c=='>') cout << (s>t ? "YES\n" : "NO\n");
  else cout << (s==t ? "YES\n" : "NO\n");
  return 0;
}