sgreen solutions to challenge 348

1 files changed, 46 insertions, 0 deletions

diff --git a/challenge-348/sgreen/python/ch-2.py b/challenge-348/sgreen/python/ch-2.py
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+++ b/challenge-348/sgreen/python/ch-2.py
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+#!/usr/bin/env python3
+
+import re
+import sys
+
+def time_to_minute(s: str) -> int:
+    if not re.match(r'^\d{1,2}:\d{2}$', s):
+        raise ValueError("Invalid time format, should be HH:MM")
+
+    hour, minute = map(int, s.split(':'))
+
+    if hour < 0 or hour > 23 or minute < 0 or minute > 59:
+        raise ValueError("Invalid time format")
+
+    return hour * 60 + minute
+
+
+def convert_time(source: str, target: str) -> int:
+    # Convert the time to minutes past midnight, and calculate the minutes
+    #  between them
+    duration = time_to_minute(target) - time_to_minute(source)
+    if duration < 0:
+        # Adjust for next day
+        duration += 24 * 60
+
+    # Possible increments in minutes
+    moves = [60, 15, 5, 1]
+    count = 0
+
+    for move in moves:
+        # Use as many of this move as possible
+        count += duration // move
+
+        # The remaining minutes
+        duration %= move
+
+    return count
+
+
+def main():
+    result = convert_time(sys.argv[1], sys.argv[2])
+    print(result)
+
+
+if __name__ == '__main__':
+    main()