sgreen solutions to challenge 323

7 files changed, 181 insertions, 2 deletions

diff --git a/challenge-323/sgreen/README.md b/challenge-323/sgreen/README.md
index 34165c0406..2e2ab9bc80 100644
--- a/challenge-323/sgreen/README.md
+++ b/challenge-323/sgreen/README.md
@@ -1,3 +1,3 @@
-# The Weekly Challenge 322
+# The Weekly Challenge 323
 
-Blog: [Strings and Arrays](https://dev.to/simongreennet/weekly-challenge-strings-and-arrays-4a8h)
+Blog: [Counting the tax](https://dev.to/simongreennet/weekly-challenge-counting-the-tax-53fh)
diff --git a/challenge-323/sgreen/blog.txt b/challenge-323/sgreen/blog.txt
new file mode 100644
index 0000000000..8f8d54a7af
--- /dev/null
+++ b/challenge-323/sgreen/blog.txt
@@ -0,0 +1 @@
+https://dev.to/simongreennet/weekly-challenge-counting-the-tax-53fh
\ No newline at end of file
diff --git a/challenge-323/sgreen/perl/ch-1.pl b/challenge-323/sgreen/perl/ch-1.pl
new file mode 100755
index 0000000000..e6fe905195
--- /dev/null
+++ b/challenge-323/sgreen/perl/ch-1.pl
@@ -0,0 +1,25 @@
+#!/usr/bin/env perl
+
+use strict;
+use warnings;
+use feature 'say';
+use experimental 'signatures';
+
+sub main (@operations) {
+    my $counter = 0;
+    foreach my $operation (@operations) {
+        if ($operation eq "x++" or $operation eq "++x") {
+            $counter++;
+        }
+        elsif ($operation eq "x--" or $operation eq "--x") {
+            $counter--;
+        }
+        else {
+            die "Unknown operation: $operation}";
+        }
+    };
+
+    say $counter;
+}
+
+main(@ARGV);
\ No newline at end of file
diff --git a/challenge-323/sgreen/perl/ch-2.pl b/challenge-323/sgreen/perl/ch-2.pl
new file mode 100755
index 0000000000..484e5b4168
--- /dev/null
+++ b/challenge-323/sgreen/perl/ch-2.pl
@@ -0,0 +1,48 @@
+#!/usr/bin/env perl
+
+use strict;
+use warnings;
+use feature 'say';
+use experimental 'signatures';
+
+use List::Util 'min';
+
+sub main (@numbers) {
+    # Check we have an odd number of arguments
+    die "Please provide an odd number of arguments" if @numbers % 2 == 0;
+
+    my $income       = shift(@numbers);
+    my @tax_brackets = ();
+    while ( scalar(@numbers) ) {
+        push @tax_brackets, [ shift(@numbers), shift(@numbers) ];
+    }
+
+    # Check income does not exceed the last tax bracket
+    if ( $income > $tax_brackets[-1][0] ) {
+        die "Income exceeds the last tax bracket limit.\n";
+    }
+
+    # Add a zero tax bracket
+    unshift( @tax_brackets, [ 0, 0 ] );
+
+    # Initialize total tax amount
+    my $total_tax = 0;
+
+    # Iterate through tax brackets
+    foreach my $idx ( 1 .. $#tax_brackets ) {
+        my ( $tax_threshold, $tax_rate ) = @{ $tax_brackets[$idx] };
+        $total_tax +=
+          ( min( $income, $tax_threshold ) - $tax_brackets[ $idx - 1 ][0] ) *
+          ( $tax_rate / 100 );
+
+        # We don't need to look at further brackets if income is less than
+        #  or equal to the current threshold
+        if ( $income <= $tax_threshold ) {
+            last;
+        }
+    }
+
+    say sprintf '%0.2f', $total_tax;
+}
+
+main(@ARGV);
diff --git a/challenge-323/sgreen/python/ch-1.py b/challenge-323/sgreen/python/ch-1.py
new file mode 100755
index 0000000000..1932147849
--- /dev/null
+++ b/challenge-323/sgreen/python/ch-1.py
@@ -0,0 +1,33 @@
+#!/usr/bin/env python3
+
+import sys
+
+
+def increment_decrement(operations: list) -> int:
+    """
+    This function takes a list of strings representing increment and decrement operations
+    on a variable `x` initialized to 0. It returns the final value of `x` after applying
+    all operations in the list.
+    :param operations: List of strings, each representing an operation on `x`
+    :return: Final value of `x` after all operations
+    """
+
+    counter = 0
+    for operation in operations:
+        if operation == "x++" or operation == "++x":
+            counter += 1
+        elif operation == "x--" or operation == "--x":
+            counter -= 1
+        else:
+            raise ValueError(f"Unknown operation: {operation}")
+
+    return counter
+
+
+def main():
+    result = increment_decrement(sys.argv[1:])
+    print(result)
+
+
+if __name__ == '__main__':
+    main()
diff --git a/challenge-323/sgreen/python/ch-2.py b/challenge-323/sgreen/python/ch-2.py
new file mode 100755
index 0000000000..1947d2dfe3
--- /dev/null
+++ b/challenge-323/sgreen/python/ch-2.py
@@ -0,0 +1,50 @@
+#!/usr/bin/env python3
+
+import sys
+
+
+def tax_amount(income, tax_brackets: list) -> float:
+    """
+    Calculate the total tax amount based on income and tax brackets.
+    :param income: The income for which tax is to be calculated
+    :param tax_brackets: A list of tax brackets, where each bracket is a list containing
+                         the upper limit of the bracket and the tax rate for that bracket.
+    :return: The total tax amount as a Decimal
+    """
+    # Check income does not exceed the last tax bracket
+    if income > tax_brackets[-1][0]:
+        raise ValueError("Income exceeds the last tax bracket limit.")
+
+    # Add a zero tax bracket
+    tax_brackets.insert(0, [0, 0])
+
+    # Initialize total tax amount
+    total_tax = 0
+
+    # Iterate through tax brackets
+    for idx in range(1, len(tax_brackets)):
+        tax_threshold, tax_rate = tax_brackets[idx]
+        total_tax += (min(income, tax_threshold) - tax_brackets[idx - 1][0]) * (tax_rate / 100)
+
+        # We don't need to look at further brackets if income is less than
+        #  or equal to the current threshold
+        if income <= tax_threshold:
+            break
+
+    return round(total_tax, 2)
+
+def main():
+    # Convert input into floating point numbers
+    array = [float(n) for n in sys.argv[1:]]
+
+    if len(array) < 3 or len(array) % 2 == 0:
+        raise ValueError("Input must contain at least one income and at least one tax bracket.")
+    income = array[0]
+    tax_brackets = [array[i:i + 2] for i in range(1, len(array), 2)]
+
+    result = tax_amount(income, tax_brackets)
+    print(result)
+
+
+if __name__ == '__main__':
+    main()
diff --git a/challenge-323/sgreen/python/test.py b/challenge-323/sgreen/python/test.py
new file mode 100755
index 0000000000..ac48d28290
--- /dev/null
+++ b/challenge-323/sgreen/python/test.py
@@ -0,0 +1,22 @@
+#!/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.increment_decrement(["--x", "x++", "x++"]), 1)
+        self.assertEqual(ch_1.increment_decrement(["x++", "++x", "x++"]), 3)
+        self.assertEqual(ch_1.increment_decrement(["x++", "++x", "--x", "x--"]), 0)
+
+    def test_ch_2(self):
+        self.assertEqual(ch_2.tax_amount(10, [[3, 50], [7, 10], [12,25]]), 2.65)
+        self.assertEqual(ch_2.tax_amount(2, [[1, 0], [4, 25], [5,50]]), 0.25)
+        self.assertEqual(ch_2.tax_amount(0, [[2, 50]]), 0)
+
+
+if __name__ == '__main__':
+    unittest.main()