4 files changed, 63 insertions, 0 deletions
diff --git a/challenge-072/lubos-kolouch/perl/ch-1.pl b/challenge-072/lubos-kolouch/perl/ch-1.pl
new file mode 100644
index 0000000000..b0193d7141
--- /dev/null
+++ b/challenge-072/lubos-kolouch/perl/ch-1.pl
@@ -0,0 +1,20 @@
+use strict;
+use warnings;
+
+sub trailing_zeros {
+    my ($n)   = @_;
+    my $count = 0;
+    my $i     = 5;
+    while ( $n / $i >= 1 ) {
+        $count += int( $n / $i );
+        $i     *= 5;
+    }
+    return $count;
+}
+
+# Test cases:
+print trailing_zeros(10);    # Output: 2
+print "\n";
+print trailing_zeros(7);     # Output: 1
+print "\n";
+print trailing_zeros(4);     # Output: 0
diff --git a/challenge-072/lubos-kolouch/perl/ch-2.pl b/challenge-072/lubos-kolouch/perl/ch-2.pl
new file mode 100644
index 0000000000..ddd57cb59d
--- /dev/null
+++ b/challenge-072/lubos-kolouch/perl/ch-2.pl
@@ -0,0 +1,13 @@
+use strict;
+use warnings;
+
+sub display_lines {
+    my ( $file_name, $a, $b ) = @_;
+    open my $file, '<', $file_name or die "Could not open '$file_name': $!";
+    my @lines = <$file>;
+    print @lines[ $a - 1 .. $b - 1 ];
+    close $file;
+}
+
+# Suppose 'input.txt' is a file in the same directory with content as described in the problem
+display_lines( 'input.txt', 4, 12 );
diff --git a/challenge-072/lubos-kolouch/python/ch-1.py b/challenge-072/lubos-kolouch/python/ch-1.py
new file mode 100644
index 0000000000..c61b1f14bc
--- /dev/null
+++ b/challenge-072/lubos-kolouch/python/ch-1.py
@@ -0,0 +1,17 @@
+#!/usr/bin/env python
+# -*- coding: utf-8 -*-
+
+
+def trailing_zeros(n: int) -> int:
+    count = 0
+    i = 5
+    while n // i >= 1:
+        count += n // i
+        i *= 5
+    return count
+
+
+# Test cases:
+print(trailing_zeros(10))  # Output: 2
+print(trailing_zeros(7))  # Output: 1
+print(trailing_zeros(4))  # Output: 0
diff --git a/challenge-072/lubos-kolouch/python/ch-2.py b/challenge-072/lubos-kolouch/python/ch-2.py
new file mode 100644
index 0000000000..5525686a22
--- /dev/null
+++ b/challenge-072/lubos-kolouch/python/ch-2.py
@@ -0,0 +1,13 @@
+#!/usr/bin/env python
+# -*- coding: utf-8 -*-
+
+
+def display_lines(file_name: str, a: int, b: int) -> None:
+    with open(file_name, "r") as file:
+        lines = file.readlines()
+        for line in lines[a - 1 : b]:
+            print(line.strip())
+
+
+# Suppose 'input.txt' is a file in the same directory with content as described in the problem
+display_lines("input.txt", 4, 12)