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145 lines
3.5 KiB
PHP
145 lines
3.5 KiB
PHP
<?php
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/*
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* By Gnieark https://blog-du-grouik.tinad.fr oct 2015
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* Anwser to "code golf" http://codegolf.stackexchange.com/questions/57952/where-is-the-arrow-pointing in PHP
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* short version
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*/
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$a=explode("\n",file_get_contents('./input.txt'));
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$i=0;
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foreach($a as $b){
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$c[$i]=str_split($b,1);
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if((!isset($y)) && in_array('S',$c[$i])){
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$y=$i;
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$x=array_search('S',$c[$i]);
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}
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$i++;
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}
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if(!isset($y)){
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echo "Il n'y a pas de départ S dans ce parcours";
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die;
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}
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echo "\n".file_get_contents('./input.txt')."\nLe départ est aux positions ".$c[$y][$x]." [".$x.",".$y."]. Démarrage du script...\n";
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$d=-1;
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$e=-1;
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$f=count($c[0]) -1;
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$g=count($c) -1;
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$h=array();
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while(1==1){
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switch($c[$y][$x]){
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case "S":
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case "+":
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$j=a($x,$y,$d,$e);
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if($j){ c($j[0],$j[1]);}
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else{b();}
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break;
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case "s":
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b();
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break;
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case "-":
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if($d < $x){
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$k=$x+1;
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if(in_array($c[$y][$k],array('-','+','S','>','^','V'))){c($k,$y);}
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else{b();}
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}else{
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$k=$x-1;
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if(in_array($c[$y][$k],array('-','+','S','<','^','V'))){c($k,$y);}
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else{b();}
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}
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break;
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case "|":
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if($e < $y){
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$l=$y+1;
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if(in_array($c[$l][$x],array('|','+','S','>','<','V'))){c ($x,$l);}
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else{b();}
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}else{
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$l=$y - 1;
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if(in_array($c[$l][$x],array('|','+','S','>','<','V'))){c ($x,$l);}else{b();}
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}
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break;
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case "^":
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case "V":
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case ">":
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case "<":
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d($c[$y][$x]);
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break;
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}
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}
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function d($m){
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global $x,$y,$f,$g,$c;
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switch($m){
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case "^":
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$k=$x;
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$l=$y -1;
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$n=array(" ","V","-","s");
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break;
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case "V":
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$k=$x;
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$l=$y + 1;
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$n=array(" ","^","-","s");
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break;
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case ">":
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$k=$x + 1;
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$l=$y;
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$n=array(" ","<","|","s");
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break;
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case "<":
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$k=$x - 1;
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$l=$y;
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$n=array(" ",">","|","s");
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break;
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default:
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break;
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}
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if(($k <0) OR ($l<0) OR ($k>$f) OR ($l>$g) OR (in_array($c[$l][$k],$n))){b();}else{
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if(preg_match("/^[a-z]$/",strtolower($c[$l][$k]))){
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echo "WIN: ".$c[$l][$k]."\n";
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die;
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}else{c($k,$l);}
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}
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}
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function a($xCross,$yCross,$d,$e){
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if(e($xCross,$yCross +1 ,$xCross,$yCross,$d,$e)){return array($xCross,$yCross +1);}
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elseif(e($xCross,$yCross -1 ,$xCross,$yCross,$d,$e)){return array($xCross,$yCross -1);}
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elseif(e($xCross-1,$yCross,$xCross,$yCross,$d,$e)){return array($xCross-1,$yCross);}
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elseif(e($xCross+1,$yCross,$xCross,$yCross,$d,$e)){return array($xCross+1,$yCross);}
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else{return false;}
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}
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function e($o,$p,$q,$r,$s,$t){
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global $h,$f,$g,$c;
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if(($o < 0) OR ($p < 0) OR ($o >= $f) OR ($p >= $g)){return false;}
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if(
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($c[$p][$o]==" ")
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OR (($o==$s)&&($p==$t))
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OR (($o==$q)&&($c[$p][$o]=="-"))
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OR (($p==$r)&&($c[$p][$o]=="|"))
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OR ((isset($h[$q."-".$r])) && (in_array($o."-".$p,$h[$q."-".$r])))
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){return false;}
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return true;
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}
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function c($k,$l){
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global $d,$e,$x,$y,$h,$c;
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if(($c[$y][$x]=='S')OR ($c[$y][$x]=='+')){
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$h[$x."-".$y][]=$d."-".$e;
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$h[$x."-".$y][]=$k."-".$l;
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}
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$d=$x;
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$e=$y;
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$x=$k;
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$y=$l;
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echo "deplacement en ".$x.";".$y."\n";
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}
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function b(){
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global $x,$y,$d,$e,$f,$g,$h;
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foreach($h as $v => $u){
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list($w,$z)=explode("-",$v);
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$aa=a($w,$z,-1,-1);
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if($aa){
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c($w,$z);
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return true;
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}
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}
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echo "Aucun chemin n'est possible\n";
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die;
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}
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