Merge branch 'manwar:master' into master

7 files changed, 143 insertions, 2 deletions

diff --git a/challenge-320/sgreen/README.md b/challenge-320/sgreen/README.md
index 2be75d9b36..030723f69a 100644
--- a/challenge-320/sgreen/README.md
+++ b/challenge-320/sgreen/README.md
@@ -1,3 +1,3 @@
-# The Weekly Challenge 319
+# The Weekly Challenge 320
 
-Blog: [Words and numbers](https://dev.to/simongreennet/words-and-numbers-54k6)
+Blog: [Words and numbers](https://dev.to/simongreennet/weekly-challenge-the-maximum-difference-2bnm)
diff --git a/challenge-320/sgreen/blog.txt b/challenge-320/sgreen/blog.txt
new file mode 100644
index 0000000000..ea76ea7ea2
--- /dev/null
+++ b/challenge-320/sgreen/blog.txt
@@ -0,0 +1 @@
+https://dev.to/simongreennet/weekly-challenge-the-maximum-difference-2bnm
\ No newline at end of file
diff --git a/challenge-320/sgreen/perl/ch-1.pl b/challenge-320/sgreen/perl/ch-1.pl
new file mode 100755
index 0000000000..4e4a667069
--- /dev/null
+++ b/challenge-320/sgreen/perl/ch-1.pl
@@ -0,0 +1,19 @@
+#!/usr/bin/env perl
+
+use strict;
+use warnings;
+use feature 'say';
+use experimental 'signatures';
+
+use List::Util 'max';
+
+sub main (@ints) {
+    # Count the number of positive and negative integers
+    my $pos_count = grep { $_ > 0 } @ints;
+    my $neg_count = grep { $_ < 0 } @ints;
+
+    # Return the maximum of these two values
+    say max( $pos_count, $neg_count );
+}
+
+main(@ARGV);
diff --git a/challenge-320/sgreen/perl/ch-2.pl b/challenge-320/sgreen/perl/ch-2.pl
new file mode 100755
index 0000000000..0451ed4dc5
--- /dev/null
+++ b/challenge-320/sgreen/perl/ch-2.pl
@@ -0,0 +1,30 @@
+#!/usr/bin/env perl
+
+use strict;
+use warnings;
+use feature 'say';
+use experimental 'signatures';
+
+use List::Util qw(any sum);
+
+sub main (@ints) {
+    my $difference = 0;
+
+    # Check we are only given positive integers
+    if ( any { $_ < 0 } @ints ) {
+        die "Only positive integers allowed";
+    }
+
+    foreach my $i (@ints) {
+        # Single digit integers have no difference
+        if ( $i > 9 ) {
+            # Calculate the difference between the number and the sum of the
+            #  individual digits
+            $difference += $i - sum( split( //, $i ) );
+        }
+    }
+
+    say abs($difference);
+}
+
+main(@ARGV);
diff --git a/challenge-320/sgreen/python/ch-1.py b/challenge-320/sgreen/python/ch-1.py
new file mode 100755
index 0000000000..60156de33e
--- /dev/null
+++ b/challenge-320/sgreen/python/ch-1.py
@@ -0,0 +1,31 @@
+#!/usr/bin/env python3
+
+import sys
+
+
+def maximum_count(ints: list) -> int:
+    """Return the maximum between the number of positive and negative integers
+
+    Args:
+        ints (list): A list of integers
+
+    Returns:
+        int: The maximum
+    """
+
+    # Count the number of positive and negative integers
+    pos_count = sum(1 for i in ints if i > 0)
+    neg_count = sum(1 for i in ints if i < 0)
+
+    # Return the maximum of these two values
+    return max(pos_count, neg_count)
+
+def main():
+    # Convert input into integers
+    array = [int(n) for n in sys.argv[1:]]
+    result = maximum_count(array)
+    print(result)
+
+
+if __name__ == '__main__':
+    main()
diff --git a/challenge-320/sgreen/python/ch-2.py b/challenge-320/sgreen/python/ch-2.py
new file mode 100755
index 0000000000..cda60d3d8d
--- /dev/null
+++ b/challenge-320/sgreen/python/ch-2.py
@@ -0,0 +1,39 @@
+#!/usr/bin/env python3
+
+import sys
+
+
+def sum_difference(ints: list) -> int:
+    """Calculate the absolute difference between digit sum and element
+    sum of the given list.
+
+    Args:
+        ints (list): A list of positive integers
+
+    Returns:
+        int: The absolute difference.
+    """
+    # Check we are only given positive integers
+    if any(i < 1 for i in ints):
+        raise ValueError('Only positive integers allowed')
+
+    difference = 0
+    for i in ints:
+        # Single digit integers have no difference
+        if i > 9:
+            # Calculate the difference between the number and the sum of the
+            #  individual digits
+            difference += i - sum(int(d) for d in str(i))
+
+    return abs(difference)
+
+
+def main():
+    # Convert input into integers
+    array = [int(n) for n in sys.argv[1:]]
+    result = sum_difference(array)
+    print(result)
+
+
+if __name__ == '__main__':
+    main()
diff --git a/challenge-320/sgreen/python/test.py b/challenge-320/sgreen/python/test.py
new file mode 100755
index 0000000000..81900ad922
--- /dev/null
+++ b/challenge-320/sgreen/python/test.py
@@ -0,0 +1,21 @@
+#!/usr/bin/env python3
+
+import unittest
+ch_1 = __import__('ch-1')
+ch_2 = __import__('ch-2')
+
+
+class TestClass(unittest.TestCase):
+    def test_ch_1(self):
+        self.assertEqual(ch_1.maximum_count([-3, -2, -1, 1, 2, 3]), 3)
+        self.assertEqual(ch_1.maximum_count([-2, -1, 0, 0, 1]), 2)
+        self.assertEqual(ch_1.maximum_count([1, 2, 3, 4]), 4)
+
+    def test_ch_2(self):
+        self.assertEqual(ch_2.sum_difference([1, 23, 4, 5]), 18)
+        self.assertEqual(ch_2.sum_difference([1, 2, 3, 4, 5]), 0)
+        self.assertEqual(ch_2.sum_difference([1, 2, 34]), 27)
+
+
+if __name__ == '__main__':
+    unittest.main()