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  1. <?php
  2. function randP($p) {
  3. if (($r=rand(0, 99)) <($p-1)) return 2;  // 80% случаев
  4.  //else не надо
  5.  
  6.  
  7. if (($r = ((int) (($r-$p)/20*9))+1) < 2) return $r; //1 
  8. return ($r+1);
  9. }
  10. for ($i=0;$i<100;$i++) {
  11.         echo randP(80)."\n";
  12. }
  13.  
Success #stdin #stdout 0.01s 20568KB
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https://ideone.com/pNc7BV
language:
PHP (php 7.3.5)
created:
10 years ago
visibility:
public

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