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 PHP7 (7.0.15) (judge verdict: Wrong Answer)

<?php
fscanf(STDIN, '%d', $n);
fscanf(STDIN, '%s', $s);

$white = substr_count($s, '.');
if ($white === 0 || $white === $n) {
    echo 0;
    return;
}
$blackCount = substr_count($s, '#');
$blackFirstPos = strpos($s, '#');
$blackLastPos = strrpos($s, '#');
if ($blackFirstPos === 0) {
    // 先頭が黒の場合は、白の数か黒の数が少ない方を出力する
    echo min(($n - ($n - $white)), $blackCount);
} elseif ($blackCount === 1 && $blackLastPos === $n - 1) {
    // 黒が1つしかない && 末尾が黒
    echo 0;
} else  {
    //　先頭が黒ではない && 末尾が黒ではない場合
    echo min($n - ($blackFirstPos + $blackCount), $blackCount);
}