Solutions challenge-066.

2 files changed, 111 insertions, 0 deletions

diff --git a/challenge-066/wanderdoc/perl/ch-1.pl b/challenge-066/wanderdoc/perl/ch-1.pl
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+#!perl
+use strict;
+use warnings FATAL => qw(all);
+
+=prompt
+You are given two integers $M and $N.
+
+Write a script to divide the given two integers i.e. $M / $N without using multiplication, division and mod operator and return the floor of the result of the division.
+Example 1:
+
+Input: $M = 5, $N = 2
+Output: 2
+
+Example 2:
+
+Input: $M = -5, $N = 2
+Output: -2
+
+Example 3:
+
+Input: $M = -5, $N = -2
+Output: 2
+
+=cut
+use Test::More;
+
+sub floor_division
+{
+     my ($m, $n) = @_;
+     die "Division by 0$/" if 0 == $n;
+     return 0 if 0 == $m;
+     
+     my $sign = 1;
+     if ( $m < 0 ) { $sign = 0 - $sign; }
+     if ( $n < 0 ) { $sign = 0 - $sign; }
+     
+     $m = abs($m);
+     $n = abs($n);
+
+
+     my $counter = 0;
+     while ( $m > $n )
+     {
+
+          $m -= $n;
+          $counter++;
+     }
+     return 1 == $sign ? $counter : 0 - $counter;
+
+}
+
+is(floor_division( 5,  2),  2, ' 5 /  2');
+is(floor_division(-5,  2), -2, '-5 /  2');
+is(floor_division(-5, -2),  2, '-5 / -2');
+is(floor_division(10,  3),  3, '10 /  3');
+is(floor_division(17, -2), -8, '17 / -2');
+
+
+done_testing();
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diff --git a/challenge-066/wanderdoc/perl/ch-2.pl b/challenge-066/wanderdoc/perl/ch-2.pl
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+++ b/challenge-066/wanderdoc/perl/ch-2.pl
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+#!perl
+use strict;
+use warnings FATAL => qw(all);
+
+=prompt
+You are given an integer $N.
+
+Write a script to check if the given number can be expressed as mn where m and n are positive integers. Otherwise print 0.
+Example 1:
+
+For given $N = 9, it should print 3^2.
+Example 2:
+
+For given $N = 45, it should print 0.
+=cut
+
+
+
+use Test::More;
+
+is(check_power(9), '3^2', '9 can');
+is(check_power(45), 0, '45 cannot');
+is(check_power(387420489), '3^18', '387420489 can');
+is(check_power(322687697779), '19^9', '322687697779 can');
+is(check_power(982451653), 0, '982451653 cannot');
+
+is(check_power(312079600999), '199^5', '312079600999 can');
+is(check_power(100000004987), 0, '100000004987 cannot');
+is(check_power(584318301411328), '22^11', '584318301411328 can');
+
+done_testing();
+sub check_power
+{
+     my $num = $_[0];
+     for my $i ( 2 .. sqrt($num) )
+     {
+
+          my $result = $i;
+
+
+          my $counter = 1;
+          while ( $result < $num )
+          {
+
+               $result *= $i;
+               $counter++;
+               return return $i . '^' . $counter if $result == $num;
+          }
+
+     }
+     return 0;
+}
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