Week 306 - Odd game

3 files changed, 71 insertions, 0 deletions

diff --git a/challenge-306/peter-campbell-smith/blog.txt b/challenge-306/peter-campbell-smith/blog.txt
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+http://ccgi.campbellsmiths.force9.co.uk/challenge/306
diff --git a/challenge-306/peter-campbell-smith/perl/ch-1.pl b/challenge-306/peter-campbell-smith/perl/ch-1.pl
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+++ b/challenge-306/peter-campbell-smith/perl/ch-1.pl
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+#!/usr/bin/perl
+
+# Blog: http://ccgi.campbellsmiths.force9.co.uk/challenge
+
+use v5.26;    # The Weekly Challenge - 2024-12-27
+use utf8;     # Week 306 - task 1 - Odd sum
+use warnings; # Peter Campbell Smith
+binmode STDOUT, ':utf8';
+
+odd_sum(2, 5, 3, 6, 4);
+odd_sum(99);
+odd_sum(1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20);
+
+sub odd_sum {
+	
+    my (@ints, $sum, $start, $end);
+    
+    # initialise
+    @ints = @_;
+	$sum = 0;
+    
+    # loop over start and end points
+    for $start (0 .. $#ints) {
+		for ($end = $start; $end <= $#ints; $end += 2) {
+			$sum += $ints[$_] for $start .. $end;
+		}
+    }
+    
+    # report
+    say qq[\nInput:  \@ints = (] . join(', ', @ints) . qq[)];
+    say qq[Output: $sum];
+}
diff --git a/challenge-306/peter-campbell-smith/perl/ch-2.pl b/challenge-306/peter-campbell-smith/perl/ch-2.pl
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+#!/usr/bin/perl
+
+# Blog: http://ccgi.campbellsmiths.force9.co.uk/challenge
+
+use v5.26;    # The Weekly Challenge - 2024-12-27
+use utf8;     # Week 306 - task 2 - Last element
+use warnings; # Peter Campbell Smith
+binmode STDOUT, ':utf8';
+
+last_element(3, 8, 5, 2, 9, 2);
+last_element(3, 2, 5);
+last_element(43, 21, 56, 86, 2, 69, 10, 43, 77, 30);
+
+sub last_element {
+	
+	my (@ints, $x);
+	
+	# initialise
+	@ints = @_;
+	say qq[\nInput:  \@ints = (] . join(', ', @_) . ')';
+	
+	# loop until 0 or 1 element left
+	while ($#ints > 0) {
+		@ints = sort {$b <=> $a} @ints;
+		
+		# if x == y
+		if ($ints[0] == $ints[1]) {
+			shift @ints; 
+			shift @ints;
+		
+		# if x != y
+		} else {
+			$x = shift @ints;
+			$ints[0] = $x - $ints[0];
+		}
+	}
+	say qq[Output: ] . ($ints[0] or 0);
+}