2 files changed, 95 insertions, 0 deletions
diff --git a/challenge-323/packy-anderson/python/ch-1.py b/challenge-323/packy-anderson/python/ch-1.py
new file mode 100755
index 0000000000..5cbccba4aa
--- /dev/null
+++ b/challenge-323/packy-anderson/python/ch-1.py
@@ -0,0 +1,33 @@
+#!/usr/bin/env python
+
+def incDec(operations):
+  x = 0
+  old_x = 0
+  o = ''
+  explain = []
+  for op in operations:
+    x = x + 1 if "++" in op else x - 1
+    o =  '+'  if "++" in op else  '-'
+    explain.append(
+      'Operation "{}" => {:2d} {} 1 => {:2d}'.format(
+                  op,    old_x, o,       x
+      )
+    )
+    old_x = x
+  return x, "\n".join(explain)
+
+def solution(operations):
+  display = '"' + '", "'.join(operations) + '"'
+  print(f'Input: @operations = ({display})')
+  output, explain = incDec(operations)
+  print(f'Output: {output}\n\n{explain}')
+
+
+print('Example 1:')
+solution(["--x", "x++", "x++"])
+
+print('\nExample 2:')
+solution(["x++", "++x", "x++"])
+
+print('\nExample 3:')
+solution(["x++", "++x", "--x", "x--"])
diff --git a/challenge-323/packy-anderson/python/ch-2.py b/challenge-323/packy-anderson/python/ch-2.py
new file mode 100755
index 0000000000..c5c646192d
--- /dev/null
+++ b/challenge-323/packy-anderson/python/ch-2.py
@@ -0,0 +1,62 @@
+#!/usr/bin/env python
+
+def fmt(num):
+  if num > 0:
+    # display to 100ths place
+    return '{:0.2f}'.format(num)
+  else:
+    # format it as a string
+    return f"{int(num)}"
+
+def taxAmt(income, tax):
+  if income == 0:
+    return 0, "" # special case
+
+  last_max = 0
+  total = 0
+  operations = []
+  subtotals = []
+  for max_income, rate in tax:
+    # adjust the maximum amount at this rate
+    # to be relative to the last rate
+    max_income -= last_max
+    # the amount to be taxed at this rate
+    amt = min(income, max_income)
+    tax = amt * rate/100
+    total += tax
+    # make sure we display to 100ths place
+    # if we hace a non-zero tax amount
+    tax = fmt(tax)
+    # save the steps so we can display them at the end
+    operations.append(f"({amt} * {rate}/100)")
+    subtotals.append(tax)
+    # we've just taxed $amt, so remove it from $income
+    income -= amt
+    # adjust the last rate for the next loop
+    last_max += max_income
+    # bail if there's no more income
+    if income <= 0: break
+
+  return (
+    total,
+    "Total Tax => " + ' + '.join(operations) + "\n" +
+    "          => " + ' + '.join(subtotals) + "\n" +
+    "          => " + fmt(total)
+  )
+
+def solution(income, tax):
+  brackets = [ f"[{t[0]},{t[1]}]" for t in tax ]
+  display = ", ".join(brackets)
+  print(f'Input: $income = {income}, @tax = ({display})')
+  output, explain = taxAmt(income, tax)
+  print(f'Output: {output}\n\n{explain}')
+
+
+print('Example 1:')
+solution(10, [[3, 50], [7, 10], [12,25]])
+
+print('\nExample 2:')
+solution(2, [[1, 0], [4, 25], [5,50]])
+
+print('\nExample 3:')
+solution(0, [[2, 50],])