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Gnieark 2015-11-25 20:35:23 +01:00
parent c30b264fa5
commit f2e07f9a03
1 changed files with 19 additions and 20 deletions
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euler25.php
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@ -1,26 +1,25 @@
<?php <?php
/* /*
* Gnieark's anwser to euler problem 25 * Gnieark's anwser to euler problem 26
* https://projecteuler.net/problem=25 * https://projecteuler.net/problem=26
*/ */
$beastDenominateur=0;
$longestCycle=0;
for ($denominateur=2; $denominateur < 1000; $denominateur ++){
//see https://fr.wikipedia.org/wiki/Suite_de_Fibonacci#Avec_la_formule_de_Binet $reste=1;
echo intval((log(10)*999 + (log(5)/2) ) / log(1.61803398875)) +1; $restes=array();
$count=0;
/* while (!in_array($reste,$restes)){
Very long solution that didn't test : $restes[]=$reste;
$reste=$reste*10;
$i=1; $reste=fmod($reste,$denominateur);
$j=2;
$count=2;
while(strlen($i)<1000){
$new=gmp_add($i,$j);
$i=$j;
$j=$new;
$count++; $count++;
}
if($count > $longestCycle){
$longestCycle=$count;
$beastDenominateur=$denominateur;
}
} }
echo $beastDenominateur."\n";
echo $count;
*/