// C++ includes used for precompiling -*- C++ -*-

// Copyright (C) 2003-2013 Free Software Foundation, Inc.
//
// This file is part of the GNU ISO C++ Library.  This library is free
// software; you can redistribute it and/or modify it under the
// terms of the GNU General Public License as published by the
// Free Software Foundation; either version 3, or (at your option)
// any later version.

// This library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.

// Under Section 7 of GPL version 3, you are granted additional
// permissions described in the GCC Runtime Library Exception, version
// 3.1, as published by the Free Software Foundation.

// You should have received a copy of the GNU General Public License and
// a copy of the GCC Runtime Library Exception along with this program;
// see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
// <http://www.gnu.org/licenses/>.

/** @file stdc++.h
 *  This is an implementation file for a precompiled header.
 */

// 17.4.1.2 Headers

// C
#ifndef _GLIBCXX_NO_ASSERT
#include <cassert>
#endif
#include <cctype>
#include <cerrno>
#include <cfloat>
#include <ciso646>
#include <climits>
#include <clocale>
#include <cmath>
#include <csetjmp>
#include <csignal>
#include <cstdarg>
#include <cstddef>
#include <cstdio>
#include <cstdlib>
#include <cstring>
#include <ctime>

#if __cplusplus >= 201103L
#include <ccomplex>
#include <cfenv>
#include <cinttypes>
// #include <cstdalign>
#include <cstdbool>
#include <cstdint>
#include <ctgmath>
#include <cwchar>
#include <cwctype>
#endif

// C++
#include <algorithm>
#include <bitset>
#include <complex>
#include <deque>
#include <exception>
#include <fstream>
#include <functional>
#include <iomanip>
#include <ios>
#include <iosfwd>
#include <iostream>
#include <istream>
#include <iterator>
#include <limits>
#include <list>
#include <locale>
#include <map>
#include <memory>
#include <new>
#include <numeric>
#include <ostream>
#include <queue>
#include <set>
#include <sstream>
#include <stack>
#include <stdexcept>
#include <streambuf>
#include <string>
#include <typeinfo>
#include <utility>
#include <valarray>
#include <vector>

#if __cplusplus >= 201103L
#include <array>
#include <atomic>
#include <chrono>
#include <condition_variable>
#include <forward_list>
#include <future>
#include <initializer_list>
#include <mutex>
#include <random>
#include <ratio>
#include <regex>
#include <scoped_allocator>
#include <system_error>
#include <thread>
#include <tuple>
#include <typeindex>
#include <type_traits>
#include <unordered_map>
#include <unordered_set>
#endif

using namespace std;
typedef long long ll;

// int main()
// {

//   ll n;
//   string s;
//   bool bo = false;

//   ll b = 0, w = 0;
//   ll total = 0;

//   cin >> n >> s;

//   for (ll i = n - 1; i >= 0; i--)
//   {
//     if (bo)
//     {
//       if (s[i] == '.')
//       {

//         bo = false;
//         if (b >= w)
//         {
//           total += w;
//         }
//         else
//         {
//           total += b;
//         }
//         w = 1;
//         b = 0;
//       }
//       else
//       {
//         b++;
//       }
//     }
//     else
//     {
//       if (s[i] == '#')
//       {
//         bo = true;
//         b++;
//       }
//       else
//       {
//         w++;
//       }
//     }
//   }

//   if (bo)
//   {
//     if (b >= w)
//     {
//       total += w;
//     }
//     else
//     {
//       total += b;
//     }
//   }
//   else
//   {
//   }

//   cout << total << endl;

//   return 0;
// }

int main()
{
  ll a, b, c;
  cin >> a >> b >> c;

  if (a < c && c < b)
  {
    cout << "Yes" << endl;
  }
  else if (a > c && b < c)
  {
    cout << "Yes" << endl;
  }
  else
  {
    cout << "No" << endl;
  }

  return 0;
}


Measured memory_bytes: 256