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

int main() {
  string a, b;
  cin >> a >> b;
  reverse(a.begin(), a.end());
  reverse(b.begin(), b.end());
  while (a.size() < b.size()) a += '0';
  while (a.size() > b.size()) b += '0';
  assert(a.size() == b.size());
  bool ok = true;
  rep(i, a.size()) ok &= a[i] >= b[i];
  cout << (ok ? "Yes" : "No") << endl;
  return 0;
}