From d5b8860595aeadac077c5c588d5b3cacba331507 Mon Sep 17 00:00:00 2001
From: Simon Green <mail@simon.green>
Date: Sun, 23 Oct 2022 23:23:27 +1100
Subject: Simon's solution to challenge 187

---
 challenge-187/sgreen/python/ch-1.py | 43 +++++++++++++++++++++++++++++++++++++
 challenge-187/sgreen/python/ch-2.py | 28 ++++++++++++++++++++++++
 2 files changed, 71 insertions(+)
 create mode 100755 challenge-187/sgreen/python/ch-1.py
 create mode 100755 challenge-187/sgreen/python/ch-2.py

(limited to 'challenge-187/sgreen/python')

diff --git a/challenge-187/sgreen/python/ch-1.py b/challenge-187/sgreen/python/ch-1.py
new file mode 100755
index 0000000000..5aa9ac45b7
--- /dev/null
+++ b/challenge-187/sgreen/python/ch-1.py
@@ -0,0 +1,43 @@
+#!/usr/bin/env python3
+
+import sys
+from datetime import date
+
+
+def get_dofy(dt):
+    '''Turn a date in DD-MM format into day of year'''
+    (day, month) = dt.split('-')
+    d = date(2022, int(month), int(day))
+    return int(d.strftime('%j'))
+
+
+def main(array):
+    '''Calculate the days that foo and bar spent together'''
+
+    # Convert the input into the day of year
+    foo_start = get_dofy(array[0])
+    foo_end = get_dofy(array[1])
+    bar_start = get_dofy(array[2])
+    bar_end = get_dofy(array[3])
+
+    # Make sure they arrive before they leave!
+    if foo_end < foo_start:
+        raise ValueError('foo left before they arrived!')
+    if bar_end < bar_start:
+        raise ValueError('bar left before they arrived!')
+
+    # The time they spent together is when the last person arrives and the first one leave.
+    both_start = max(foo_start, bar_start)
+    both_end = min(foo_end, bar_end)
+
+    # Display the days spent together
+    if both_end < both_start:
+        print('0 days')
+    elif both_start == both_end:
+        print('1 day')
+    else:
+        print(f'{both_end - both_start + 1} days')
+
+
+if __name__ == '__main__':
+    main(sys.argv[1:5])
diff --git a/challenge-187/sgreen/python/ch-2.py b/challenge-187/sgreen/python/ch-2.py
new file mode 100755
index 0000000000..e76921c374
--- /dev/null
+++ b/challenge-187/sgreen/python/ch-2.py
@@ -0,0 +1,28 @@
+#!/usr/bin/env python3
+
+import sys
+from decimal import Decimal
+from itertools import combinations
+
+
+def main(array):
+    solution = None
+
+    # Turn the array into integers
+    n = [Decimal(x) for x in array]
+
+    # Calculate for all combinations
+    for new in combinations(n, 3):
+        (a, b, c) = new
+        if a + b > c and b + c > a and a + c > b:
+            if solution is None or sum(new) > sum(solution):
+                solution = sorted(new, reverse = True)
+
+    if solution:
+        print('(' + ', '.join(str(x) for x in solution) + ')')
+    else:
+        print('()')
+
+
+if __name__ == '__main__':
+    main(sys.argv[1:])
-- 
cgit