Created
February 25, 2019 08:28
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#!/usr/bin/env perl | |
use strict; | |
use warnings; | |
use feature 'say'; | |
use DDP { deparse => 1 }; | |
my @seeds; | |
for (1..100){ | |
push(@seeds, int(rand(100))); | |
} | |
my %hash; | |
my @array = grep{!$hash{$_}++}@seeds; | |
@array = sort {$a <=> $b} @array; | |
p @array; | |
my ($s, $e) = (0, scalar @array - 1); | |
my $target = 23; | |
my $size = @array; | |
my $result; | |
my $c = 1; | |
while ($size > 1){ | |
say "loop: $c,size: $size, s: $s, e: $e"; | |
my $i = int($size / 2); | |
if ($array[$s + $i] == $target){ | |
$result = $s + $i; | |
last; | |
} elsif ($array[$s + $i] > $target){ | |
$e = $s + $i; | |
} else{ | |
$s = $s + $i; | |
} | |
$size = $e - $s; | |
$c++; | |
} | |
if ($result){ | |
say "result : $result"; | |
} else { | |
say "$target not incluide."; | |
} |
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