From 77b30efaae318d0d4fe4b8c1f9bcb89c0f853ffa Mon Sep 17 00:00:00 2001
From: David Ferrone <zapwai@gmail.com>
Date: Mon, 6 Oct 2025 10:58:28 -0400
Subject: Week 342

---
 challenge-342/zapwai/perl/ch-1.pl | 46 +++++++++++++++++++++++++++++++++++++++
 challenge-342/zapwai/perl/ch-2.pl | 34 +++++++++++++++++++++++++++++
 2 files changed, 80 insertions(+)
 create mode 100644 challenge-342/zapwai/perl/ch-1.pl
 create mode 100644 challenge-342/zapwai/perl/ch-2.pl

diff --git a/challenge-342/zapwai/perl/ch-1.pl b/challenge-342/zapwai/perl/ch-1.pl
new file mode 100644
index 0000000000..cc3dea0c9b
--- /dev/null
+++ b/challenge-342/zapwai/perl/ch-1.pl
@@ -0,0 +1,46 @@
+use v5.38;
+
+sub proc($str) {
+    say "Input: $str";
+    my @num;
+    my @let;
+    for my $l (split '', $str) {
+	if ($l =~ /\d/) {
+	    push @num, $l;
+	} else {
+	    push @let, $l;
+	}
+    }
+
+    if (abs(scalar @num - scalar @let) >= 2) {
+	say "Output: \"\"";
+    } else {
+	my $o;
+	if (scalar @num > scalar @let) {
+	    $o = $num[0];
+	    for my $i (0 .. $#let) {
+		$o = $o.$let[$i].$num[$i+1];
+	    }
+	} else {
+	    $o = $let[0];
+	    for my $i (0 .. $#num) {
+		$o = $o.$num[$i].$let[$i+1];
+	    }
+	}
+	say "Output: \"$o\"";
+    }
+    
+}
+
+my $str = "a0b1c2";
+proc($str);
+$str = "abc12";
+proc($str);
+$str = "0a1b2c3";
+proc($str);
+$str = "1a23";
+proc($str);
+$str = "ab123";
+proc($str);
+
+## Champion of the week! Yay! Thank you PWC and M. Anwar :-)
diff --git a/challenge-342/zapwai/perl/ch-2.pl b/challenge-342/zapwai/perl/ch-2.pl
new file mode 100644
index 0000000000..3ecf2f2467
--- /dev/null
+++ b/challenge-342/zapwai/perl/ch-2.pl
@@ -0,0 +1,34 @@
+use v5.38;
+
+sub proc($str) {
+    say "Input: $str";
+    my $max = 0;
+    for my $len (1 .. length( $str ) - 1) {
+	my $pre = substr $str, 0, $len;
+	my $post = substr $str, $len;
+	my $left_sum = 0; # Sum of zeros on left
+	my $right_sum = 0; # Sum of ones on right
+	for my $n (split '', $pre) {
+	    $left_sum++ if ($n eq "0");
+	}
+	for my $n (split '', $post) {
+	    $right_sum++ if ($n eq "1");
+	}
+	my $total = $left_sum + $right_sum;
+	if ($max < $total) {
+	    $max = $total;
+	}
+    }
+    say "Output: $max";
+}
+
+my $str = "0011";
+proc($str);
+$str = "0000";
+proc($str);
+$str = "1111";
+proc($str);
+$str = "0101";
+proc($str);
+$str = "011101";
+proc($str);
-- 
cgit