这是网上很火的2018刑侦推理试题，网上已经有人推理得出答案。

作为程序员当然想的是如何用编程得出答案.

php代码如下

    'C','B'=>'D','C'=>'A','D'=>'B');	if($question[$data[2]] == $data[5]) return true;	return false;}function check_3($data){	$question = array('A'=>$data[3],'B'=>$data[6],'C'=>$data[2],'D'=>$data[4]);	$answer = $question[$data[3]];	unset($question[$data[3]]);	if(!in_array($answer,$question)) return true;	return false;}function check_4($data){	$question = array('A'=>$data[1]==$data[5],'B'=>$data[2]==$data[7],'C'=>$data[1]==$data[9],'D'=>$data[6]==$data[10]);	return $question[$data[4]];}function check_5($data){	$question = array('A'=>$data[8],'B'=>$data[4],'C'=>$data[9],'D'=>$data[7]);	if($question[$data[5]] == $data[5]) return true;	return false;}function check_6($data){	$question = array('A'=>$data[2]==$data[4] && $data[4]==$data[8],'B'=>$data[1]==$data[6] && $data[6]==$data[8],'C'=>$data[3]==$data[10] && $data[10]==$data[8],'D'=>$data[5]==$data[9] && $data[9]=$data[8]);	return $question[$data[6]];	}function check_7($data){	$question = array('A'=>'C','B'=>'B','C'=>'A','D'=>'D');	$count = array_count_values($data);	arsort($count);	if(array_pop(array_keys($count))==$question[$data[7]]) return true;	return false;}function check_8($data){	$map = array('A'=>1,'B'=>2,'C'=>3,'D'=>4);	$question = array('A'=>$data[7],'B'=>$data['5'],'C'=>$data['2'],'D'=>$data['10']);	if(abs($map[$data[1]] - $map[$question[$data[8]]])>1) return true;	return false;}function check_9($data){	$question = array('A'=>$data[6],'B'=>$data[10],'C'=>$data[2],'D'=>$data[9]);	if(($question[$data[9]] == $data[5])!=($data[1] == $data[6]))return true;	return false;	}function check_10($data){	$question = array('A'=>3,'B'=>2,'C'=>4,'D'=>1);	$count = array_count_values($data);	arsort($count);	$min = array_pop($count);	asort($count);	$max = array_pop($count);	if($question[$data[10]] == $max-$min) return true;	return false;}foreach($option as $v[1]){	foreach($option as $v[2]){		foreach($option as $v[3]){			foreach($option as $v[4]){				foreach($option as $v[5]){					foreach($option as $v[6]){						foreach($option as $v[7]){							foreach($option as $v[8]){								foreach($option as $v[9]){									foreach($option as $v[10]){										for($i=1;$i<=10;$i++){											$answer[$i] = $v[$i];										}										for($i=1;$i<=10;$i++){											$func = "check_".$i;											if(!$func($answer)) break;										}										if($i == 11) {echo implode(' ',$answer)."\r\n";die;}									}								}							}						}					}				}			}		}	}}?>

结果输出：B C A C A C D A B A

应该是正确答案，不过用的是最简单的暴力破解算法，不过计算机不就是干这事儿的么.

当然算法还可以想其他方法比如动态规划等等.