<?php
const min = 1;	 # начало
	  $N  = 1000;   # всего
 
	  $DP = 1;	 # ~ процент повторов
	  $DC = 0;	 # количество повторов (при генерации)
 
$BS = rand(min, ($N + 1));
 
$numbers = range(min, ($N + 1));
 
shuffle($numbers);
 
foreach ($numbers as $i => $number) {
	if (
		rand(0, 99) < $DP &&
		$BS !== $number
	) {
		$numbers[$i] = $BS;
		$DC++;
	}
}
 
shuffle($numbers);
 
// алгоритм
 
$BadSeed;
 
//
 
print "bad seed: $BS \n";
print "повторов: $DC \n";
print "нашел bad seed: $BadSeed \n";

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