Problem:
Score : 100 points

Problem Statement

There are three houses on a number line: House 1, 2 and 3, with coordinates A, B and C, respectively.
Print Yes if we pass the coordinate of House 3 on the straight way from House 1 to House 2 without making a detour, and print No otherwise.

Constraints

0\leq A,B,C\leq 100

A, B and C are distinct integers.

Input

Input is given from Standard Input in the following format:

A B C

Output

Print Yes if we pass the coordinate of House 3 on the straight way from House 1 to House 2 without making a detour, and print No otherwise.

Sample Input 1

3 8 5

Sample Output 1

Yes

We pass the coordinate 5 on the straight way from the house at coordinate 3 to the house at coordinate 8.

Sample Input 2

7 3 1

Sample Output 2

No

Sample Input 3

10 2 4

Sample Output 3

Yes

Sample Input 4

31 41 59

Sample Output 4

No

Solution in C# (Mono 4.6.2.0) (judge verdict: Accepted)

using System;
using System.Text;
using System.Linq;
using System.Collections;
using System.Collections.Generic;
 
 
class Program
{
 
 
    static void Main(string[] args)
    {
 
		char[] cs = new char[] { ' ' };
		//char[] cs = new char[] { ' ', ',' };
 
        //int val = int.Parse(Console.ReadLine());
        //int[] vals = parseAry(Console.ReadLine().Split(cs));
        //string str = Console.ReadLine();
        //string[] strs = Console.ReadLine().Split(cs);
 
        //string res="";
        //int res = 0; ;
        //int t = int.Parse(Console.ReadLine());
        //string str = Console.ReadLine();
        //int[] vals = parseAry(Console.ReadLine().Split(cs));
        //int n = int.Parse(Console.ReadLine());
		//string res="";
		string res = "No";
 
		int[] vals = parseAry(Console.ReadLine().Split(cs));
 
		if ( vals[0] < vals[2] && vals[2] < vals[1] ) { res = "Yes"; }
		if ( vals[0] > vals[2] && vals[2] > vals[1] ) { res = "Yes"; }
		
			Console.WriteLine(res);
 
 
        return;
    }
 
    //　String[]  ----->  int[]
    static int[] parseAry(string[] str)
    {
        int[] nums = new int[str.Length];
        for (int i = 0; i < str.Length; i++) { nums[i] = int.Parse(str[i]); }
        return nums;
    }
    //　String[]  ----->  long[]
    static long[] parseAryL(string[] str)
    {
        long[] nums = new long[str.Length];
        for (int i = 0; i < str.Length; i++) { nums[i] = long.Parse(str[i]); }
        return nums;
    }
 
    //文字列を1文字ずつString[]に入れる
    static string[] strAry(String str)
    {
        string[] re = new string[str.Length];
        for (int i = 0; i < str.Length; i++) { re[i] = str[i].ToString(); }
        return re;
    }
 
}